The Wealth of Nations by Part 4 Chapter 7 Page 29

government have been go far established as is necessary for their protection. Every colonist gets more land than he can possibly cultivate. He has no rent, and scarce any taxes to pay.

No landlord shares with him in its produce, and the share of the sovereign is commonly but a trifle. He has every motive to render as great as possible a produce, which is thus to be almost entirely his own. But his land is commonly so extensive that, with all his own industry, and with all the industry of other people whom he can get to employ, he can seldom make it produce the tenth part of what it is capable of producing. He is eager, therefore, to collect labourers from all quarters, and to reward them with the most liberal wages. But those liberal wages, joined to the plenty and cheapness of land, soon make those labourers leave him,