The Wealth of Nations by Part 4 Chapter 7 Page 194

colonies, has never hitherto demanded of them anything which even approached to a just proportion to what was paid by their fellow subjects at home. If the contribution of the colonies, besides, was to rise or fall in proportion to the rise or fall of the land tax, Parliament could not tax them without taxing at the same time its own constituents, and the colonies might in this case be considered as virtually represented in Parliament.

Examples are not wanting of empires in which all the different provinces are not taxed, if I may be allowed the expression, in one mass; but in which the sovereign regulates the sum which each province ought to pay, and in some provinces assesses and levies it as he thinks proper; while in others, he leaves it to be assessed and levied as the respective states of each province shall