As a trustee, government was expected to serve the interests of the people, not the rulers; and rulers were expected to follow the laws enacted by legislatures. Locke also held that the main purpose of men uniting into commonwealths and governments was for the preservation of their property. Despite the ambiguity of Locke's definition of property, which limited property to "as much land as a man tills, plants, improves, cultivates, and can use the product of", this principle held great appeal to individuals possessed of great wealth.