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422 that general prices depend on other causes, and are never raised by any circumstance which affects all kinds of productive employment in the same manner and degree. A rise of wages occasioned by a tax, must, like any other increase of the cost of labour, be defrayed from profits. To attempt to tax day-labourers, in an old country, is merely to impose an extra tax upon all employers of common labour; unless the tax has the much worse effect of permanently lowering the standard of comfortable subsistence in the minds of the poorest class.

We find in the preceding considerations an additional argument for the opinion already expressed, that direct taxation should stop short of the class of incomes which do not exceed what is necessary for healthful existence. These very small incomes are mostly derived from manual labour; and, as we now see, any tax imposed on these, either permanently degrades the habits of the labouring class, or falls on profits, and burthens capitalists with an indirect tax, in addition to their share of the direct taxes; which is doubly objectionable, both as a violation of the fundamental rule of equality, and for the reasons which, as already shown, render a peculiar tax on profits detrimental to the public wealth, and consequently to the means which society possesses of paying any taxes whatever.

§ 5.We now pass, from taxes on the separate kinds of income, to a tax attempted to be assessed fairly upon all kinds; in other words, an Income Tax. The discussion of the conditions necessary for making this tax consistent with justice, has been anticipated in the last chapter. We shall suppose, therefore, that these conditions are complied with. They are, first, that incomes below a certain amount should be altogether untaxed. This minimum should not be higher than the amount which suffices for the necessaries of the existing population. The exemption from the present income tax, of all incomes under 100l. a year, and the