The Wealth of Nations by Part 5 Chapter 2 Page 264

nothing but the great fertility of the soil and happiness of the climate could preserve such countries from soon relapsing into the lowest state of poverty and barbarism. Taxes upon consumable commodities may either be levied by an administration of which the officers are appointed by government and are immediately accountable to government, of which the revenue must in this case vary from year to year according to the occasional variations in the produce of the tax, or they may be let in farm for a rent certain, the farmer being allowed to appoint his own officers, who, though obliged to levy the tax in the manner directed by the law, are under his immediate inspection, and are immediately accountable to him.

The best and most frugal way of levying a tax can never be by farm. Over and above what is necessary for paying