Alfred Charles Michaud, Our coming world (1951)
“ Do you use no money at all on your planet? How do you measure value and what medium of exchange have you? That same butler, or your cook, how does he measure the value of his labor and service? And how do you measure it and what do you give them in exchange? You Martians must have some medium of exchange to give your people, a strong incentive to do good, honest work and service, to excel, to improve, to research, and to invent so that they can benefit and better their conditions of life. ”
