§ 9. #Forms of taxation.# The following are the forms of taxation most frequently referred to.
(a) The simplest form of tax is a poll tax, a uniform amount payable by every person of the taxable class. This form of tax is being less and less used in America and now amounts to little more than $17,000,000,[5] this being only .6 of 1 per cent of the aggregate taxes in the United States. The national government gets about one-fourth of this amount from a tax on immigrants and the rest is collected by (some of) the states, counties, and minor divisions. Usually, if not always, the poll tax is imposed only upon voters, as a condition to the right to vote.
(b) Taxes may be laid upon incomes, as they come into the possession of the owner. Usually, only monetary incomes that arise in commercial transactions are taxable, and no attempt is made to estimate the value of psychic incomes. Commercial incomes are more easily measured, but the omission of the other elements must cause many inequalities in the burden of the tax as between two individuals controlling equal incomes of real things.
(c) Taxes may be on property, either general upon all property in the taxing district, or special, upon certain forms of property. A property tax may be specific or ad valorem, in proportion to value, as to the method of its determination. Since the value of material wealth is the capitalization of the rentals at the prevailing rate of interest, a general, ad valorem, property tax, so far as it applies to material wealth, and if it were accurately assessed, would take an approximately equal proportion of wealth-incomes. It does not, of course, touch directly incomes derived from wages and salaries, but it reduces their purchasing power in many cases. It is in some respects more searching than a tax on actual rents, for it reaches the prospective, or speculative, rental.
(d) Taxes may be on expenditure (sometimes called taxes on consumption). This is but another mode of attacking income, for in the long run most income is spent, not always by the individual who earned it, but by some one, and thus it is reached by a tax on expenditure. Usually in the United States the tariff duties are accounted to be taxes on expenditure, as also the internal revenues (also called excises) of the national government. In time of war, internal revenues are extended in the United States to a multitude of articles, but usually they have been limited (with minor exceptions) to liquor and tobacco. Most of these taxes are in fact levied not at the time of purchase by the ultimate consumer, but upon the specific goods in the hands of some merchant or business agency, and some of them are essentially special property taxes and others are business taxes of the kind next to be mentioned.
(e) Taxes may be levied on selected agencies of industry or on the process of business; such are business taxes, licenses, taxes on investment in business, and corporation taxes. These burdens are diffused and rest eventually on some income, rarely to be ascertained exactly.
§ 10. #Defective tax "systems."# The actual tax laws of each division of government in a country combine the various forms in different proportions. Most of the federal taxes are from tariff duties and from internal revenues; the latter include a variety of special business and property taxes and, since 1913, the federal income tax. The largest receipts of states, of counties, and of minor divisions are from property taxes, some special but most of them general in form. Among the various states a wide diversity is found. Some use the general property tax for all the divisions (state and local), while others (several of the Northern states and California) have separated the sources of state and local taxation, taxing corporations for state purposes, and most other forms of wealth for local purposes. Some states, particularly those of the South, make large use of licenses and taxes on business both for state and local purposes. The tax laws of many states have been much modified of late and are still in process of change. It is only in a loose sense that one can speak of the tax "system" of any state, made up as it is of so many diverse elements, each used to tap in some independent way some source of private income for public purposes. Every tax "system" has grown up more or less accidentally, guided by no more of a general principle than the advice of the cynical old statesman—so to pluck the feathers of the goose that it will squawk as little as possible. Thus, everywhere, the existing situation must be largely accounted for by custom and ignorance, by the weakness of some classes and the undue influence of other classes, rather than by clearly thought out principles soundly administered.
§ 11. #Various standards of justice suggested.# There have not been lacking earnest attempts to arrive at some general principles. Many standards have been suggested to measure the distribution of the burden of taxation, such as benefit, equality, and ability. Each of these terms is capable of various interpretations which have changed from time to time. The benefit derived by any citizen from most of the public services evidently cannot be measured with exactness. The standard of equality cannot be applied in any literal sense to strong and weak, to rich and poor. It is possible, however, to interpret equality with reference not to objective goods, but to the psychic sacrifice occasioned by taxation. Ability is of many kinds and may be differently understood. Some think ability to bear taxation is "in exact proportion to the money income"; others believe that it increases at a greater rate than money income, and favor, therefore, progressive taxation, that is, higher rates on the larger incomes.
§ 12. #Social welfare as the aim.# The conflicting interests of the various classes of taxpayers in each period are to some degree softened by the prevailing public opinion, sometimes called the social conscience, and taxes are adjusted according to a vaguely held ideal of the social welfare. Social expediency, more or less broadly interpreted, determines who shall be taxed and what social results are to be sought. The exemptions from taxation in feudal times were great and, viewed from our standpoint, were inequitable, for the upper classes escaped while the peasants bore most of the burdens. The landlords and nobility, who were assumed to be performing important social functions, generally had outgrown their usefulness in the period preceding the French Revolution, which swept away many of these abuses.
Exemptions from taxation are granted liberally in most states to-day on some kinds of wealth and to some classes of citizens, because of their supposed relations to the public interest. Real estate and equipment devoted to educational, religious, and charitable purposes, the homes of priests and ministers, homesteads purchased with pension money, as well as all public lands, buildings, and equipment are exempt.