The wealth of nations depends upon an infinite variety of causes. Situation, soil, climate, the nature of the productions, the nature of the government, the genius of the citizens, the degree of information they possess, the state of commerce, of arts, of industry, these circumstances and many more, too complex, minute, or adventitious to admit of a particular specification, occasion differences hardly conceivable in the relative opulence and riches of different countries. The consequence clearly is that there can be no common measure of national wealth, and, of course, no general or stationary rule by which the ability of a state to pay taxes can be determined. The attempt, therefore, to regulate the contributions of the members of a confederacy by any such rule, cannot fail to be productive of glaring inequality and extreme oppression.
This inequality would of itself be sufficient in America to work the eventual destruction of the Union, if any mode of enforcing a compliance with its requisitions could be devised. The suffering States would not long consent to remain associated upon a principle which distributes the public burdens with so unequal a hand, and which was calculated to impoverish and oppress the citizens of some States, while those of others would scarcely be conscious of the small proportion of the weight they were required to sustain. This, however, is an evil inseparable from the principle of quotas and requisitions.
There is no method of steering clear of this inconvenience, but by authorizing the national government to raise its own revenues in its own way. Imposts, excises, and, in general, all duties upon articles of consumption, may be compared to a fluid, which will, in time, find its level with the means of paying them. The amount to be contributed by each citizen will in a degree be at his own option, and can be regulated by an attention to his resources. The rich may be extravagant, the poor can be frugal; and private oppression may always be avoided by a judicious selection of objects proper for such impositions. If inequalities should arise in some States from duties on particular objects, these will, in all probability, be counterbalanced by proportional inequalities in other States, from the duties on other objects. In the course of time and things, an equilibrium, as far as it is attainable in so complicated a subject, will be established everywhere. Or, if inequalities should still exist, they would neither be so great in their degree, so uniform in their operation, nor so odious in their appearance, as those which would necessarily spring from quotas, upon any scale that can possibly be devised.
It is a signal advantage of taxes on articles of consumption, that they contain in their own nature a security against excess. They prescribe their own limit; which cannot be exceeded without defeating the end proposed, that is, an extension of the revenue. When applied to this object, the saying is as just as it is witty, that, "in political arithmetic, two and two do not always make four." If duties are too high, they lessen the consumption; the collection is eluded; and the product to the treasury is not so great as when they are confined within proper and moderate bounds. This forms a complete barrier against any material oppression of the citizens by taxes of this class, and is itself a natural limitation of the power of imposing them.
Impositions of this kind usually fall under the denomination of indirect taxes, and must for a long time constitute the chief part of the revenue raised in this country. Those of the direct kind, which principally relate to land and buildings, may admit of a rule of apportionment. Either the value of land, or the number of the people, may serve as a standard. The state of agriculture and the populousness of a country have been considered as nearly connected with each other. And, as a rule, for the purpose intended, numbers, in the view of simplicity and certainty, are entitled to a preference. In every country it is a herculean task to obtain a valuation of the land; in a country imperfectly settled and progressive in improvement, the difficulties are increased almost to impracticability. The expense of an accurate valuation is, in all situations, a formidable objection. In a branch of taxation where no limits to the discretion of the government are to be found in the nature of things, the establishment of a fixed rule, not incompatible with the end, may be attended with fewer inconveniences than to leave that discretion altogether at large.