Page:Principles of Political Economy Vol 2.djvu/456

436 an action on population, rise, in a shorter or longer period, so as to compensate the labourers for their portion of the tax; the compensation being of course at the expense of profits. Taxes on necessaries must thus have one of two effects. Either they lower the condition of the labouring classes; or they exact from the owners of capital, in addition to the amount due to the state on their own necessaries, the amount due on those consumed by the labourers. In the last case, the tax on necessaries, like a tax on wages, is equivalent to a peculiar tax on profits; which is, like all other partial taxation, unjust, and is specially prejudicial to the increase of the national wealth.

It remains to speak of the effect on rent. Assuming (what is usually the fact,) that the consumption of food is not diminished, the same cultivation as before will be necessary to supply the wants of the community; the margin of cultivation, to use Dr. Chalmers* expression, remains where it was; and the same land or capital which, as the least productive, already regulated the value and price of the whole produce, will continue to regulate them. The effect which a tax on agricultural produce will have on rent, depends on its affecting or not affecting the difference between the return to this least productive land or capital, and the returns to other lands and capitals. Now this depends on the manner in which the tax is imposed. If it is an ad valorem tax, or what is the same thing, a fixed proportion of the produce, such as tithe for example, it evidently lowers corn-rents. For it takes more corn from the better lands than from the worse; and exactly in the degree in which they are better; land of twice the productiveness paying twice as much to the tithe. Whatever takes more from the greater of two quantities than from the less, diminishes the difference between them. The imposition of a tithe on corn would take a tithe also from corn-rent: for if we reduce a series of numbers by a tenth each, the differences between them are reduced one-tenth.