The Wealth of Nations by Part 4 Chapter 5 Page 31

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