Economists since Adam Smith have argued that competition in production serves consumers' interests, while monopolies tend toward sloth and waste. Gustave de Molinari, editor of the Journal des economistes, was probably the first legal theorist who dared to ask why this should not be as true of the law as it is of apples, cotton, and iron. He argued that under the state's monopoly of law " Justice becomes slow and costly, the police vexatious, individual liberty is no longer respected, [and] the price of security is abusively inflated and inequitably apportioned. . . ." He therefore advocated a non- monopolistic legal system and projected that once " all artificial obstacles to the free action of the natural laws that govern the economic world have disappeared, the situation of the various members of society will become the best possible."
Thanks to Stefan Karlsson for the pointer.