The Wealth of Nations_ Books 4-5 - Adam Smith [50]
This second limitation of the freedom of trade according to some people should, upon some occasions, be extended much farther than to the precise foreign commodities which could come into competition with those which had been taxed at home. When the necessaries of life have been taxed in any country, it becomes proper, they pretend, to tax not only the like necessaries of life imported from other countries, but all sorts of foreign goods which can come into competition with anything that is the produce of domestic industry. Subsistence, they say, becomes necessarily dearer in consequence of such taxes; and the price of labour must always rise with the price of the labourers’ subsistence. Every commodity, therefore, which is the produce of domestic industry, though not immediately taxed itself, becomes dearer in consequence of such taxes, because the labour which produces it becomes so. Such taxes, therefore, are really equivalent, they say, to a tax upon every particular commodity produced at home. In order to put domestic upon the same footing with foreign industry, therefore, it becomes necessary, they think, to lay some duty upon every foreign commodity equal to this enhancement of the price of the home commodities with which it can come into competition.
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