The Wealth of Nations by Part 5 Chapter 2 Page 231

advanced price of his malt as the brewer and retailer in the advanced price of their liquor; and that so heavy a tax upon malt might reduce the rent and profit of barley land.

No tax can ever reduce, for any considerable time, the rate of profit in any particular trade which must always keep its level with other trades in the neighbourhood. The present duties upon malt, beer, and ale do not affect the profits of the dealers in those commodities, who all get back the tax with an additional profit in the enhanced price of their goods. A tax, indeed, may render the goods upon which it is imposed so dear as to diminish the consumption of them. But the consumption of malt is in malt liquors, and a tax of eighteen shillings upon the quarter of malt could not well render those liquors dearer than the different taxes, amounting