Black’s Law Dictionary, 6th Edition, page 1457

“Tax:     A charge by the government on the income of an individual, corporation, or trust, as well as the value of an estate or gift.  The objective in assessing the tax is to generate revenue to be used for the needs of the public.

 A pecuniary [relating to money] burden laid upon individuals or property to support the government, and is a payment exacted by legislative authority.  In re Mytinger, D.C.Tex. 31 F.Supp. 977,978,979.  Essential characteristics of a tax are that it is NOT A VOLUNTARY PAYMENT OR DONATION, BUT AN ENFORCED CONTRIBUTION, EXACTED  PURSUANT TO LEGISLATIVE AUTHORITY.  Michigan Employment Sec. Commission v. Patt, 4 Mich.App. 228, 144 N.W.2d 663, 665.  …”

[Black’s Law Dictionary, 6th Edition, page 1457]

McCulloch v. Maryland, 17 U.S. 316 @ 421 (1819)

"We admit, as all must admit, that the powers of the Government are limited, and that its limits are not to be transcended. But we think the sound construction of the Constitution must allow to the national legislature that discretion with respect to the means by which the powers it confers are to be carried into execution which will enable that body to perform the high duties assigned to it in the manner most beneficial to the people. Let the end be legitimate, let it be within the scope of the Constitution, and all means which are appropriate, which are plainly adapted to that end, which are not prohibited, but consist with the letter and spirit of the Constitution, are Constitutional."

[McCulloch v. Maryland, 17 U.S. 316 @ 421 (1819)]

McCulloch v. Maryland, 17 U.S. 316 @ 430 (1819)

"All subjects over which the sovereign power of a State extends are objects of taxation, but those over which it does not extend are, upon the soundest principles, exempt from taxation. This proposition may almost be pronounced self-evident.
The sovereignty of a State extends to everything which exists by its own authority or is introduced by its permission,..."

[McCulloch v. Maryland, 17 U.S. 316 @ 430 (1819)]

Bailey v. State, 348 N.C. 130, (1998)

"The constitutional provision against impairing contract obligations is a limitation upon the taxing power, as well as upon all legislation, whatever form it may assume. Attempted state taxation is the mode most frequently adopted to affect contracts contrary to the constitutional inhibition. "

[Bailey v. State, 348 N.C. 130, (1998)]

PDF Cong. Rec. House June 7, 1932 Page 12238

Mr. Tilson: ". . . It is not a proper function of government to support its citizens or furnish them with employment. The Government has no funds of its own and no means of collecting funds except by the strong arm of taxation, from the pockets of its citizens. It can not properly take more than is necessary to economically carry on the Government. It has no moral or constitutional right to take more than this from its citizens. Anything taken beyond this is an abuse of the taxing power. . ."

[Cong. Rec. House June 7, 1932 Page 12238]

Bouvier's Law Dictionary, 1856, Sixth Edition:

TAXES. This term in its most extended sense includes all contributions  imposed by the government upon individuals for the service of the state, by whatever name they are called or known, whether by the name of tribute,  tithe, talliage, impost, duty, gabel, custom, subsidy, aid, supply, excise,  or other name.

2. The 8th section of art. 1, Const. U. S. provides, that "congress  shall have power to lay and collect taxes, duties, imposts, and excises, to  pay," &c. "But all duties, imposts and excises shall be uniform throughout  the United States." 

3. In the sense above mentioned, taxes are usually divided into two  great classes, those which are direct, and those which are indirect. Under  the former denomination are included taxes on land or real property, and  under the latter taxes on articles of consumption. 5 Wheat. R. 317. 

4. Congress have plenary power over every species of taxable property,  except exports. But there are two rules prescribed for their government, the rule of uniformity and the rule of apportionment. Three kinds of taxes,  namely, duties, imposts and excises are to be laid by the first rule; and  capitation and other direct taxes, by the second rule. Should there be any  other species of taxes, not direct, and not included within the words duties, imposts or customs, they might be laid by the rule of uniformity or not, as congress should think proper and reasonable. Id.

5. The word taxes is, in a more confined sense, sometimes applied in contradistinction to duties, imposts and excises. Vide, generally, Story on the Const. c. 14; 1 Kent, Com. 254; 8 Dall. 171; 1 Tuck. Black. App. 232; 1 Black. Com. 308; The Federalist, No. 21, 36; Woodf. Landl. and Ten. 197, 254. 

[Bouvier's Law Dictionary, 1856, Sixth Edition]

Union Refrigerator Transit Company v. Kentucky, 199 U.S. 194 (1905):

"The power of taxation, indispensable to the existence of every civilized government, is exercised upon the assumption of an equivalent rendered to the taxpayer in the protection of his person and property, in adding to the value of such property, or in the creation and maintenance of public conveniences in which he shares -- such, for instance, as roads, bridges, sidewalks, pavements, and schools for the education of his children. If the taxing power be in no position to render these services, or otherwise to benefit the person or property taxed, and such property be wholly within the taxing power of another state, to which it may be said to owe an allegiance, and to which it looks for protection, the taxation of such property within the domicil of the owner partakes rather of the nature of an extortion than a tax and has been repeatedly held by this Court to be beyond the power of the legislature, and a taking of property without due process of law. Railroad Company v. Jackson, 7 Wall. 262 ; State Tax on Foreign-Held Bonds, 15 Wall. 300; Tappan v. Merchants' National Bank, 19 Wall. 490, 499 ; Delaware &c. R. Co. v. Pennsylvania, 198 U.S. 341, 358 . In Chicago &c. R. Co. v. Chicago, 166 U.S. 226, it was held, after full consideration, that the taking of private property [199 U.S. 203] without compensation was a denial of due process within the Fourteenth Amendment. See also Davidson v. New Orleans, 96 U.S. 97, 102; Missouri Pacific Railway v. Nebraska, 164 U.S. 403, 417; Mt. Hope Cemetery v. Boston, 158 Mass. 509, 519."

[Union Refrigerator Transit Company v. Kentucky, 199 U.S. 194 (1905)]

[EDITORIAL:  Receipt or eligibility for a "benefit" creates the statutory "person" who is the object of taxation.  To rebut the liability, rebut the eligibility for the benefit so you can claim that its extortion.  For an example how to do that in the case of Social Security, see:

Why You Aren't Eligible for Social Security, Form #06.001;]

Helvering v. Gregory, 69 F.2d. 809 (2d Cir. 1934)

“Anyone may arrange his affairs so that his taxes shall be as low as possible, he is not bound to choose that pattern which best pays the treasury. There is not even a patriotic duty to increase one’s taxes. Over and over again, the Courts have said there is nothing sinister in so arranging affairs as to keep taxes as low as possible. Everyone does it, rich and poor alike and all do right, for nobody owes any public duty to pay more than the law demands.”

[Judge Learned Hand, Helvering v. Gregory, 69 F.2d. 809 (2d Cir. 1934); See also:
Who was Judge Learned Hand?, Tax advisors]

U.S. v. Butler, 297 U.S. 1 (1936):

". . . A tax, in the general understanding of the term and as used in the constitution, signifies an exaction for the support of the government. The word has never thought to connote the expropriation of money from one group for the benefit of another. . ."

[U.S. v. Butler, 297 U.S. 1 (1936)]

City of Boise v. Ada County, 147 Idaho 794, 811 (Idaho 2009):

“Because taxation is a legislative function, a citizen's obligation to pay a tax 'is a purely statutory creation.'”

[City of Boise v. Ada County, 147 Idaho 794, 811 (Idaho 2009)]

Lane County v. Oregon, 74 U.S. 7 Wall. 71 71 (1868)

In his work on the Constitution, the late Mr. Justice Story whose praise as a jurist is in all civilized lands, speaking of the clause in the Constitution giving to Congress the power to lay and collect taxes, says of the theory which would limit the power to the object of paying the debts that, thus limited, it would be only a power to provide for the payment of debts then existing. [Footnote 4] And certainly if a narrow and limited interpretation would thus restrict the word "debts" in the Constitution, the same sort of interpretation would in like manner restrict the same word in the act. Such an interpretation needs only to be mentioned to be rejected. We refer to it only to show that a right construction must be sought through larger and less technical views. We may, then, safely decline either to limit the word "debts" to existing dues, or to extend its meaning so as to embrace all dues of whatever origin and description.

What, then, is its true sense? The most obvious, and, as it seems to us, the most rational answer to this question is that Congress must have had in contemplation debts originating in contract or demands carried into judgment, and only debts of this character. This is the commonest and most natural use of the word. Some strain is felt upon the understanding when an attempt is made to extend it so as to include taxes imposed by legislative authority, and there should be no such strain in the interpretation of a law like this.

We are the more ready to adopt this view because the greatest of English elementary writers upon law, when treating of debts in their various descriptions, gives no hint that taxes come within either, [Footnote 5] while American state courts of the highest authority have refused to treat liabilities for taxes as debts in the ordinary sense of that word, for which actions of debt may be maintained.

The first of these cases was that of Pierce v. City of Boston, [Footnote 6] 1842, in which the defendant attempted to set off against a demand of the plaintiff certain taxes due to the city. The statute allowed mutual debts to be set off, but the court disallowed the right to set off taxes. This case went, indeed, upon the construction of the statute of Massachusetts, and did not turn on the precise point before us, but the language of the court shows that taxes were not regarded as debts within the common understanding of the word.

The second case was that of Shaw v. Pickett, [Footnote 7] in which the Supreme Court of Vermont said,

"The assessment of taxes does not create a debt that can be enforced by suit, or upon which a promise to pay interest can be implied. It is a proceeding in invitum."

The next case was that of the City of Camden v. Allen, [Footnote 8] 1857. That was an action of debt brought to recover a tax by the municipality to which it was due. The language of the Supreme Court of New Jersey was still more explicit: "A tax, in its essential characteristics," said the court, "is not a debt nor in the nature of a debt. A tax is an impost levied by authority of government upon its citizens or subjects for the support of the state. It is not founded on contract or agreement. It operates in invitum. A debt is a sum of money due by certain and express agreement. It originates in and is founded upon contracts express or implied."

These decisions were all made before the acts of 1862 were passed, and they may have had some influence upon the choice of the words used. Be this as it may, we all think that the interpretation which they sanction is well warranted.

We cannot attribute to the legislature an intent to include taxes under the term debts without something more than appears in the acts to show that intention.

The Supreme Court of California, in 1862, had the construction of these acts under consideration in the case of Perry v. Washburn. [Footnote 9] The decisions which we have cited were referred to by Chief Justice Field, now holding a seat on this bench, and the very question we are now considering, "What did Congress intend by the act?" was answered in these words:

"Upon this question, we are clear that it only intended by the terms debts, public and private, such obligations for the payment of money as are founded upon contract."

In whatever light, therefore, we consider this question, whether in the light of the conflict between the legislation of Congress and the taxing power of the states, to which the interpretation, insisted on in behalf of the County of Lane, would give occasion, or in the light of the language of the acts themselves, or in the light of the decisions to which we have referred, we find ourselves brought to the same conclusion, that the clause making the United States notes a legal tender for debts has no reference to taxes imposed by state authority, but relates only to debts in the ordinary sense of the word, arising out of simple contracts or contracts by specialty, which include judgments and recognizances. [Footnote 10]

Whether the word "debts," as used in the act, includes obligations expressly made payable or adjudged to be paid in coin has been argued in another case. We express at present, no opinion on that question. [Footnote 11]

[Lane County v. Oregon, 74 U.S. 7 Wall. 71 71 (1868)]

PDF Loan Association v. Topeka, 87 U.S. 655, 20 Wall. 655 (1874):

“The power to tax is, therefore, the strongest, the most pervading of all powers of government, reaching directly or indirectly to all classes of the people.  It was said by Chief Justice Marshall, in the case of McCulloch v. Md., 4 Wheat. 431, that the power to tax is the power to destroy.  A striking instance of the truth of the proposition is seen in the fact that the existing tax of ten per cent, imposed by the United States on the circulation of all other banks than the National Banks, drove out of existence every *state bank of circulation within a year or two after its passage.  This power can be readily employed against one class of individuals and in favor of another, so as to ruin the one class and give unlimited wealth and prosperity to the other, if there is no implied limitation of the uses for which the power may be exercised.

To lay, with one hand, the power of the government on the property of the citizen, and with the other to bestow it upon favored individuals to aid private enterprises and build up private fortunes, is none the less a robbery because it is done under the forms of law and is called taxation.  This is not legislation.  It is a decree under legislative forms.

Nor is it taxation.  ‘A tax,’ says Webster’s Dictionary, ‘is a rate or sum of money assessed on the person or property of a citizen by government for the use of the nation or State.’  ‘Taxes are burdens or charges imposed by the Legislature upon persons or property to raise money for public purposes.’  Cooley, Const. Lim., 479.

Coulter, J., in Northern Liberties v. St. John’s Church, 13 Pa. St., 104 says, very forcibly, ‘I think the common mind has everywhere taken in the understanding that taxes are a public imposition, levied by authority of the government for the purposes of carrying on the government in all its machinery and operations—that they are imposed for a public purpose.’  See, also Pray v. Northern Liberties, 31 Pa.St., 69; Matter of Mayor of N.Y., 11 Johns., 77; Camden v. Allen, 2 Dutch., 398; Sharpless v. Mayor, supra; Hanson v. Vernon, 27 Ia., 47; Whiting v. Fond du Lac, supra.”

[Loan Association v. Topeka, 87 U.S. 655, 20 Wall. 655 (1874)]

Bible, Proverbs 12:24, NKJV

"The hand of the diligent will rule, but the lazy man will be put to forced labor."

Ashton v. Cameron County Water Improvement District No. 1, 298 U.S. 513; 56 S.Ct. 892 (1936):

"Like any sovereignty, a state may voluntarily consent to be sued; may permit actions against her political subdivisions to enforce their obligations. Such proceedings against these subdivisions have often been entertained in federal courts. But nothing in this tends to support the view that the federal government, acting under the bankruptcy clause, may impose its will and impair state powers-pass laws inconsistent with the idea of sovereignty."

"The power to regulate commerce is necessarily exclusive in certain fields and, to be successful, must prevail [298 U.S. 513, 532]   over obstructive regulations by the state. But, as pointed out in Houston, etc., Ry. Co. v. United States, 234 U.S. 342, 353 , 34 S.Ct. 833, 837, 'this is not to say that Congress possesses the authority to regulate the internal commerce of a state, as such, but that it does possess the power to foster and protect interstate commerce.' No similar situation is before us."

"The difficulties arising out of our dual form of government and the opportunities for differing opinions concerning the relative rights of state and national governments are many; but for a very long time this court has steadfastly adhered to the doctrine that the taxing power of Congress does not extend to the states or their political subdivisions. The same basic reasoning which leads to that conclusion, we think, requires like limitation upon the power which springs from the bankruptcy clause. United States v. Butler, supra."

[Ashton v. Cameron County Water Improvement District No. 1, 298 U.S. 513; 56 S.Ct. 892 (1936)]

Wight v. Davidson, 181 U.S. 371, 377 (1901)

“"Under some circumstances, a party who is illegally assessed may be held to have waived all right to a remedy by a course of conduct which renders it unjust and inequitable to others that he should be allowed to complain of the illegality. Such a case would exist if one should ask for and encourage the levy of the tax of which he subsequently complains; and some of the cases go far in the direction of holding that a mere failure to give notice of objections to one who, with the knowledge of the person taxed, as contractor or otherwise, is expending money in reliance upon payment from the taxes, may have the same effect." Cooley on Taxation, 573; Tagh v. Adams, 10 Cush. 252; Bidwell v. City of Pittsburgh, 85 Penn. St. 412; Lafayette v. Fowler, 34 Ind. 140; Shutte v. Thompson, 15 Wall. 151, 159.”

[Wight v. Davidson, 181 U.S. 371, 377 (1901)]

United States v. Phellis, 257 U.S. 156, 176 (1921)

“It seems incredible that Congress intended to tax as income a business transaction which admittedly produced no gain, no profit, and hence no income. If any income had accrued to the plaintiff by reason of the sale and exchange made it would doubtless be taxable."”

[United States v. Phellis, 257 U.S. 156, 176 (1921)]

Murphy v. I.R.S, 493 F.3d. 170, 181 (D.C. Cir. 2007)

“In other words, although the "Congress cannot make a thing income which is not so in fact," Burk-Waggoner Oil Ass'n v. Hopkins, 269 U.S. 110, 114, 46 S.Ct. 48, 70 L.Ed. 183 (1925), it can label a thing income and tax it, so long as it acts within its constitutional authority, which includes not only the Sixteenth Amendment but also Article I, Sections 8 and 9.”)

[EDITORIAL: And Article IV, which is the origin of the tax power in that case, which the court does not mention, for fear of revealing what is really going on there: Murphy was subject to tax on all items not expressly excluded from gross income under IRC Section 61(a) because Murphy filed as a United States person and agreed to be taxed on all income worldwide.]

[. . .]

“Only three taxes are definitely known to be direct:

(1) a capitation, U.S. CONST, art. I, § 9,

(2) a tax upon real property, and

(3) a tax upon personal property. See Fernandez v. Wiener, 326 U.S. 340, 352, 66 S.Ct. 178, 90 L.Ed. 116 (1945) ("Congress may tax real estate or chattels if the tax is apportioned"); Pollock v. Farmers' Loan Trust Co., 158 U.S. 601, 637, 15 S.Ct. 912, 39 L.Ed. 1108 (1895) ( Pollock II).

Such direct taxes are laid upon one's "general ownership of property," Bromley, 280 U.S. at 136, 50 S.Ct. 46; see also Flint v. Stone Tracy Co., 220 U.S. 107, 149, 31 S.Ct. 342, 55 L.Ed. 389 (1911), as contrasted with excise taxes laid "upon a particular use or enjoyment of property or the shifting from one to another of any power or privilege incidental to the ownership or enjoyment of property." Fernandez, 326 U.S. at 352, 66 S.Ct. 178; see also Thomas v. United States, 192 U.S. 363, 370, 24 S.Ct. 305, 48 L.Ed. 481 (1904) (excises cover "duties imposed on importation, consumption, manufacture and sale of certain commodities, privileges, particular business transactions, vocations, occupations and the like").”

[Murphy v. I.R.S, 493 F.3d. 170, 181 (D.C. Cir. 2007)]

Penn Mutual Indemnity Company v. C.I.R, 277 F.2d. 16, 20 (3d Cir. 1960)

“It is not necessary to uphold the validity of the tax imposed by the United States that the tax itself bear an accurate label. Indeed, the tax upon the distillation of spirits, imposed very early by federal authority, now reads and has read in terms of a tax upon the spirits themselves, yet the validity of this imposition has been upheld for a very great many years. It could well be argued that the tax involved here is an "excise tax" based upon the receipt of money by the taxpayer. It certainly is not a tax on property and it certainly is not a capitation tax; therefore, it need not be apportioned. We do not think it profitable, however, to make the label as precise as that required under the Food and Drug Act. Congress has the power to impose taxes generally, and if the particular imposition does not run afoul of any constitutional restrictions then the tax is lawful, call it what you will.”

[Penn Mutual Indemnity Company v. C.I.R, 277 F.2d. 16, 20 (3d Cir. 1960)]

Welch v. Henry, 305 U.S. 134, 146 (1938)

We think that the selection of such income for taxation at rates and with deductions not shown to be unrelated to an equitable distribution of the tax burden is not a denial of the equal protection commanded by the Fourteenth Amendment, U.S.C.A.Const. Amend. 14. It cannot be doubted that the receipt of dividends from a corporation is an event which may constitutionally be taxed either with or without deductions, Lynch v. Hornby, 247 U.S. 339 , 38 S.Ct. 543; see Helvering v. Inde- [305 U.S. 134, 144]   pendent Life Ins. Co., 292 U.S. 371, 381 , 54 S.Ct. 758, 760, even though the corporate income which is their source has also been taxed. See Tennessee v. Whitworth, 117 U.S. 129, 136 , 6 S.Ct. 645, 647; Klein v. Board of Tax Supervisors, 282 U.S. 19, 23 , 51 S.Ct. 15, 73 A.L.R. 679; Colgate v. Harvey, 296 U.S. 404, 420 , 56 S.Ct. 252, 254, 102 A.L.R. 54. The fact that the dividends of corporations which have to some extent borne the burden of state taxation constitute a distinct class for purposes of tax exemption, Colgate v. Harvey, supra; compare Travelers' Insurance Company v. Connecticut, 185 U.S. 364, 367 , 22 S.Ct. 673, 674; Kidd v. Alabama, 188 U.S. 730 , 23 S.Ct. 401; Darnell v. Indiana, 226 U.S. 390, 398 , 33 S.Ct. 120, and that in consequence such dividends have borne no tax burden, is equally a basis for their selection for taxation. Watson v. State Comptroller, 254 U.S. 122, 124 , 125 S., 41 S.Ct. 43, 44; Klein v. Board of Tax Supervisors, supra. Any classification of taxation is permissible which has reasonable relation to a legitimate end of governmental action. Taxation is but the means by which government distributes the burdens of its cost among those who enjoy its benefits. And the distribution of a tax burden by placing it in part on a special class which by reason of the taxing policy of the State has escaped all tax during the taxable period is not a denial of equal protection. See Watson v. Comptroller, supra, page 125, 41 S.Ct. page 44. Nor is the tax any more a denial of equal protection because retroactive. If the 1933 dividends differed sufficiently from other classes of income to admit of the taxation, in that year, of one without the other, lapse of time did not remove that difference so as to compel equality of treatment when the income was taxed at a later date. Selection then of the dividends for the new taxation can hardly be thought to be hostile or invidious when the basis of selection is the fact that the taxed income is of the class which has borne no tax burden. The equal protection clause does not preclude the legislature from changing its mind in making an otherwise permissible choice of subjects of taxation. The very fact that [305 U.S. 134, 145]   the dividends were relieved of tax, when the need for revenue was less, is basis for the legislative judgment that they should bear some of the added burden when the need is greater.

Numerous retroactive revisions of the federal and Wisconsin revenue laws, presently to be discussed, have imposed taxes on subjects previously untaxed and shifted the burden of old taxes by changes in rates, exemptions and deductions. It has never been thought that such changes involve a denial of equal protection if the new taxes could have been included in the earlier act when adopted. If some retroactive alteration in the scheme of a tax act is permissible, as is conceded, it seems plain that validity, so far as equal protection is concerned must be determined, as in the case of any other tax, by ascertaining whether the thing taxed falls within a distinct class which may rationally be treated differently from other classes. If such changes are forbidden in the name of equal protection, legislatures in laying new taxes would be left powerless to rectify to any extent a previous distribution of tax burdens which experience had shown to be inequitable, even though constitutional.

The bare fact that the present tax is imposed at different rates and with different deductions from those applied to other types of income does not establish unconstitutionality. It is a commonplace that the equal protection clause does not require a state to maintain rigid rules of equal taxation, to resort to close distinctions, or to maintain a precise scientific uniformity. Possible differences in tax burdens, not shown to be substantial, or which are based on discrimination not shown to be arbitrary or capricious, do not fall within the constitutional prohibition. Lawrence v. State Tax Commission, 286 U.S. 276, 284 , 285 S., 52 S.Ct. 556, 558, 559, 87 A.L.R. 374, and cases cited.

Just what the differences are in the tax burdens cast upon the two types of income by the divergence in rates [305 U.S. 134, 146]   and deductions applied to them does not appear. The burden placed on dividends by the taxing act might have been greater if they had been included in gross income and taxed on the same basis as other income since, in that case, the resulting increase in net income would be taxed at the rates applicable to the higher brackets. When the challenged statute was enacted there were available to the legislature the returns for the taxable year showing the different classes of income, the application to them of the existing law, and the effect of existing rates and deductions. There were also data to be derived from the corporation tax returns showing what part of the exempted dividends had their source in corporate income which had been taxed to the corporation and what part was attributable to corporate income not similarly taxed. The legislature was free to take into account all these factors in prescribing rates and deductions to be applied to the newly taxed dividends so as to arrive at an equitable distribution of the added tax burden. In the absence of any facts tending to show that the taxing act, in its purpose or effect, is a hostile or oppressive discrimination against the recipients of dividends who have been hitherto fortunate enough to escape all taxation we cannot say the taxing statute denies equal protection.

Second. The objection chiefly urged to the taxing statute is that it is a denial of due process of law because in 1935 it imposed a tax on income received in 1933. But a tax is not necessarily unconstitutional because retroactive. Milliken v. United States, 283 U.S. 15, 21 , 51 S.Ct. 324, 326, and cases cited. Taxation is neither a penalty imposed on the taxpayer nor a liability which he assumes by contract. It is but a way of apportioning the cost of government among those who in some measure are privileged to enjoy its benefits and must bear its burdens. [305 U.S. 134, 147]   Since no citizen enjoys immunity from that burden, its retroactive imposition does not necessarily infringe due process, and to challenge the present tax it is not enough to point out that the taxable event, the receipt of income, antedated the statute.

In the cases in which this Court has held invalid the taxation of gifts made and completely vested before the enactment of the taxing statute, decision was rested on the ground that the nature or amount of the tax could not reasonably have been anticipated by the taxpayer at the time of the particular voluntary act which the statute later made the taxable event. Nichols v. Coolidge, 274 U.S. 531, 542 , 47 S.Ct. 710, 713, 52 A.L.R. 1081; Untermyer v. Anderson, 276 U.S. 440, 445 , 48 S.Ct. 353, 354 (citing Blodgett v. Holden, 275 U.S. 142, 147 , 48 S.Ct. 105, 106); Coolidge v. Long, 282 U.S. 582 , 51 S.Ct. 306. Since, in each of these cases, the donor might freely have chosen to give or not to give, the taxation, after the choice was made, of a gift which he might well have refrained from making had he anticipated the tax, was thought to be so arbitrary and oppressive as to be a denial of due process. But there are other forms of taxation whose retroactive imposition cannot be said to be similarly offensive, because their incidence is not on the voluntary act of the taxpayer. And even a retroactive gift tax has been held valid where the donor was forewarned by the statute books of the possibility of such a levy, Milliken v. United States, supra. In each case it is necessary to consider the nature of the tax and the circumstances in which it is laid before it can be said that its retroactive application is so harsh and oppressive as to transgress the constitutional limitation.

[Welch v. Henry, 305 U.S. 134, 146 (1938)]

Milwaukee v. White, 296 U.S. 268 (1935)

“Even if the judgment is deemed to be colored by the nature of the obligation whose validity it establishes, and we are free to re-examine it, and, if we find it to be based on an obligation penal in character, to refuse to enforce it outside the state where rendered, see Wisconsin v. Pelican Insurance Co., 127 U.S. 265 , 292, et seq. 8 S.Ct. 1370, compare Fauntleroy v. Lum, 210 U.S. 230 , 28 S.Ct. 641, still the obligation to pay taxes is not penal. It is a statutory liability, quasi contractual in nature, enforceable, if there is no exclusive statutory remedy, in the civil courts by the common-law action of debt or indebitatus assumpsit. United States v. Chamberlin, 219 U.S. 250 , 31 S.Ct. 155; Price v. United States, 269 U.S. 492 , 46 S.Ct. 180; Dollar Savings Bank v. United States, 19 Wall. 227; and see Stockwell v. United States, 13 Wall. 531, 542; Meredith v. United States, 13 Pet. 486, 493. This was the rule established in the English courts before the Declaration of Independence. Attorney General v. Weeks, Bunbury's Exch. Rep. 223; Attorney General v. Jewers and Batty, Bunbury's Exch. Rep. 225; Attorney General v. Hatton, Bunbury's Exch. Rep. [296 U.S. 268, 272]   262; Attorney General v. _ _, 2 Ans.Rep. 558; see Comyn's Digest (Title 'Dett,' A, 9); 1 Chitty on Pleading, 123; cf. Attorney General v. Sewell, 4 M.&W. 77. “

[Milwaukee v. White, 296 U.S. 268 (1935)]

Cooley, Law of Taxation, 4th Ed., pgs 88-89

"A tax is not regarded as a debt in the ordinary sense of that term, for the reason that a tax does not depend upon the consent of the taxpayer and there is no express or implied contract to pay taxes. Taxes are not contracts between party and party, either express or implied; but they are the positive acts of the government, through its various agents, binding upon the inhabitants, and to the making and enforcing of which their personal consent individually is not required."

[Cooley, Law of Taxation, 4th Ed., pgs 88-89]

People v. Mahoney, 13 Cal.2d 729, 739 (Cal. 1939)

“Proceedings under tax statutes are in invitum and the statute will be strictly construed in favor of the taxpayer and against the state. ( Barker Bros. v. Los Angeles, 10 Cal.2d 603, 608 [ 76 P.2d 97]; Uhl v. Badaracco, 199 Cal. 270 [ 248 P. 917]; United States v. Merriam, 263 U.S. 179 [44 Sup. Ct. 69, 68 L.Ed. 240, 29 A.L.R. 1547]; Gould v. Gould, 245 U.S. 151 [38 Sup. Ct. 53, 62 L.Ed. 211].) ”

[People v. Mahoney, 13 Cal.2d 729, 739 (Cal. 1939)]

[EDITORIAL: In invitum = against a person's will or consent : by force of law irrespective of assent]

De Lima v. Bidwell, 182 U.S. 1, 125 (1901)

“MR. JUSTICE HARLAN. Does that apply to revenue cases? THE SOLICITOR GENERAL. This is not a revenue case, so opposing counsel insist. They don't concede it is a revenue case; they insist it is a common-law action to recover back money unlawfully exacted by an officer outside his authority and without authority.”

[De Lima v. Bidwell, 182 U.S. 1, 125 (1901)]

[EDITORIAL: This is an example of a litigant trying to pretend a revenue case is not a revenue case. It doesn’t work. The litigant won on constitutional grounds because it was an unconstitutional tax on exports. You can’t work around anti-injunction act by pretending you are not trying to enjoin tax assessment/collection]

The Federalist Papers, No 45 (Jan. 1788):

It is true, that the Confederacy is to possess, and may exercise, the power of collecting internal as well as external taxes throughout the States; but it is probable that this power will not be resorted to, except for supplemental purposes of revenue; that an option will then be given to the States to supply their quotas by previous collections of their own; and that the eventual collection, under the immediate authority of the Union, will generally be made by the officers, and according to the rules, appointed by the several States. Indeed it is extremely probable, that in other instances, particularly in the organization of the judicial power, the officers of the States will be clothed with the correspondent authority of the Union.

Should it happen, however, that separate collectors of internal revenue should be appointed under the federal government, the influence of the whole number would not bear a comparison with that of the multitude of State officers in the opposite scale.

Within every district to which a federal collector would be allotted, there would not be less than thirty or forty, or even more, officers of different descriptions, and many of them persons of character and weight, whose influence would lie on the side of the State. The powers delegated by the proposed Constitution to the federal government are few and defined. Those which are to remain in the State governments are numerous and indefinite. The former will be exercised principally on external objects, as war, peace, negotiation, and foreign commerce; with which last the power of taxation will, for the most part, be connected. The powers reserved to the several States will extend to all the objects which, in the ordinary course of affairs, concern the lives, liberties, and properties of the people, and the internal order, improvement, and prosperity of the State. The operations of the federal government will be most extensive and important in times of war and danger; those of the State governments, in times of peace and security. As the former periods will probably bear a small proportion to the latter, the State governments will here enjoy another advantage over the federal government. The more adequate, indeed, the federal powers may be rendered to the national defense, the less frequent will be those scenes of danger which might favor their ascendancy over the governments of the particular States. If the new Constitution be examined with accuracy and candor, it will be found that the change which it proposes consists much less in the addition of NEW POWERS to the Union, than in the invigoration of its ORIGINAL POWERS. The regulation of commerce, it is true, is a new power; but that seems to be an addition which few oppose, and from which no apprehensions are entertained. The powers relating to war and peace, armies and fleets, treaties and finance, with the other more considerable powers, are all vested in the existing Congress by the articles of Confederation. The proposed change does not enlarge these powers; it only substitutes a more effectual mode of administering them. The change relating to taxation may be regarded as the most important; and yet the present Congress have as complete authority to REQUIRE of the States indefinite supplies of money for the common defense and general welfare, as the future Congress will have to require them of individual citizens; and the latter will be no more bound than the States themselves have been, to pay the quotas respectively taxed on them. Had the States complied punctually with the articles of Confederation, or could their compliance have been enforced by as peaceable means as may be used with success towards single persons, our past experience is very far from countenancing an opinion, that the State governments would have lost their constitutional powers, and have gradually undergone an entire consolidation. To maintain that such an event would have ensued, would be to say at once, that the existence of the State governments is incompatible with any system whatever that accomplishes the essential purposes of the Union.

[The Federalist Papers, No 45 (Jan. 1788)]