The Wealth of Nations by Part 5 Chapter 2 Page 67

his rent, in kind. The quantity to be collected, and the district within which it is to be collected, are so small that they both can oversee, with their own eyes, the collection and disposal of every part of what is due to them.

A gentleman of great fortune, who lived in the capital, would be in danger of suffering much by the neglect, and more by the fraud of his factors and agents, if the rents of an estate in a distant province were to be paid to him in this manner. The loss of the sovereign from the abuse and depredation of his tax-gatherers would necessarily be much greater. The servants of the most careless private person are, perhaps, more under the eye of their master than those of the most careful prince; and a public revenue which was paid in kind would suffer so much from the mismanagement of the collectors