Whether taxes upon the necessaries of life, such as those in Great Britain upon soap, salt, leather, candles, etc. necessarily raise the price of labour, and consequently that of all other commodities, I shall consider hereafter, when I come to treat of taxes. Supposing, however, in the meantime, that they have this effect, and they have it undoubtedly, this general enhancement of the price of all commodities, in consequence of that of labour, is a case which differs in the two following respects from that of a particular commodity, of which the price was enhanced by a particular tax immediately imposed upon it.
First, it might always be known with great exactness how far the price of such a commodity could be enhanced by such a tax: but how far the general enhancement of the price of labour might affect that of every different commodity about which labour was employed, could never be known with any tolerable exactness. It would be impossible, therefore, to proportion with any tolerable exactness the tax upon every foreign, to this enhancement of the price of every home commodity.
Secondly, taxes upon the necessaries of life have nearly the same effect upon the circumstances of the people as a poor soil and a bad climate. Provisions are thereby rendered dearer in the same manner as if it required extraordinary labour and expense to raise them. As in the natural scarcity arising from soil and climate, it would be absurd to direct the people in what manner they ought to employ their capitals and industry, so is it likewise in the artificial scarcity arising from such taxes. To be left to accommodate, as well as they could, their industry to their situation, and to find out those employments in which, notwithstanding their unfavourable circumstances, they might have some advantage either in the home or in the foreign market, is what in both cases would evidently be most for their advantage. To lay a new tax upon them, because they are already overburdened with taxes, and because they already pay too dear for the necessaries of life, to make them likewise pay too dear for the greater part of other commodities, is certainly a most absurd way of making amends.