We may roughly say that the man who during his lifetime has deprived himself of leisure during ten hours a day has given far more to society than the one who has only deprived himself of leisure during five hours a day, or who has not deprived himself at all. But we cannot take what he has done during two hours and say that the yield is worth twice as much as the yield of another individual, working only one hour, and remunerate him in proportion.
