The Wealth of Nations by Part 5 Chapter 2 Page 236

been a monopoly price, and the argument adduced to show that sugar was an improper subject of taxation demonstrated, perhaps, that it was a proper one, the gains of monopolists, whenever they can be come at, being certainly of all subjects the most proper. But the ordinary price of barley has never been a monopoly price, and the rent and profit of barley land have never been above their natural proportion to those of other equally fertile and equally well-cultivated land.

The different taxes which have been imposed upon malt, beer, and ale have never lowered the price of barley, have never reduced the rent and profit of barley land. The price of malt to the brewer has constantly risen in proportion to the taxes imposed upon it, and those taxes, together with the different duties upon beer and ale, have constantly either