The Wealth of Nations by Part 3 Chapter 4 Page 8

large estate must be consumed upon the estate itself, it will frequently be more convenient for the proprietor that part of it be consumed at a distance from his own house provided they who consume it are as dependent upon him as either his retainers or his menial servants. He is thereby saved from the embarrassment of either too large a company or too large a family. A tenant at will, who possesses land sufficient to maintain his family for little more than a quit-rent, is as dependent upon the proprietor as any servant or retainer whatever and must obey him with as little reserve.

Such a proprietor, as he feeds his servants and retainers at his own house, so he feeds his tenants at their houses. The subsistence of both is derived from his bounty, and its continuance depends upon his good pleasure.