The classic productive capitalist wants to found a company to provide a new, socially useful good or service and make money by sales. In contrast, the classic parasitic rentier wants to bribe the state legislature into privatizing and selling state roads so that he or she can make money without effort or innovation every time somebody drives and pays a toll.
http://www.salon.com/2013/03/22/how_rich_moochers_ruin_america/