The Wealth of Nations by Part 5 Chapter 2 Page 114

latter would have enjoyed a monopoly of the trade, and like all other monopolists would soon have combined to raise their profits much beyond what was necessary for the payment of the tax. The final payment, instead of falling upon the shopkeeper, would have fallen upon the consumer, with a considerable overcharge to the profit of the shopkeeper. For these reasons the project of a tax upon shops was laid aside, and in the room of it was substituted the subsidy, 1759.

What in France is called the personal taille is, perhaps, the most important tax upon the profits of stock employed in agriculture that is levied in any part of Europe.

In the disorderly state of Europe during the prevalence of the feudal government, the sovereign was obliged to content himself with taxing those who were too weak to refuse to pay taxes.