The Wealth of Nations_ Books 4-5 - Adam Smith [79]
Our country gentlemen, when they imposed the high duties upon the importation of foreign corn, which in times of moderate plenty amount to a prohibition, and when they established the bounty, seem to have imitated the conduct of our manufacturers. By the one institution, they secured to themselves the monopoly of the home market, and by the other they endeavoured to prevent that market from ever being overstocked with their commodity. By both they endeavoured to raise its real value, in the same manner as our manufacturers had, by the like institutions, raised the real value of many different sorts of manufactured goods. They did not perhaps attend to the great and essential difference which nature has established between corn and almost every other sort of goods. When, either by the monopoly of the home market, or by a bounty upon exportation, you enable our woollen or linen manufacturers to sell their goods for somewhat a better price than they otherwise could get for them, you raise, not only the nominal, but the real price of those goods. You render them equivalent to a greater quantity of labour and subsistence, you increase not only the nominal, but the real profit, the real wealth and revenue of those manufacturers, and you enable them either to live better themselves, or to employ a greater quantity of labour in those particular manufactures. You really encourage those manufactures, and direct towards them a greater quantity of the industry of the country than what would probably go to them of its own accord. But when by the like institutions you raise the nominal or money-price of corn, you do not raise its real value. You do not increase the real wealth, the real revenue either of our farmers or country gentlemen. You do not encourage the growth of corn, because you do not enable them to maintain and employ more labourers in raising it. The nature of things has stamped upon corn a real value which cannot be altered by merely altering its money price. No bounty upon exportation, no monopoly of the home market, can raise that value. The freest competition cannot lower it. Through the world in general that value is equal to the quantity of labour which it can maintain, and in every particular place it is equal to the quantity of labour which it can maintain in the way, whether liberal, moderate, or scanty, in which labour is commonly maintained in that place. Woollen or linen cloth are not the regulating commodities by which the real value of all other commodities must be finally measured and determined; corn is. The real value of every other commodity is finally measured and determined by the proportion which its average money price bears to the average money price of corn. The real value of corn does not vary with those variations in its average money price, which sometimes occur from one century to another. It is the real value of silver which varies with them.
Bounties upon the exportation of any home-made commodity are liable, first, to that general objection which may be made to all the different expedients of the mercantile system; the objection of forcing some part of the industry of the country into a channel less advantageous than that in which it would run of its own accord: and, secondly, to the particular objection of forcing it, not only into a channel that is less advantageous, but into one that is actually disadvantageous; the trade which cannot be carried on but by means of a