What impels every man to the utmost exertion in the service of his fellow man. Is, in the market not compulsion on the part of gendarmes, hangmen and penal courts, it is self interest.
Competition on the market aims at assigning to every individual that function in the social system in which he can render to all his fellow men the most valuable of the services he is able to perform.
Nobody is in a position to decree what should make a fellow man happier.