In certain professions there is no shortage of new applicants but, on the contrary, many people who are waiting to enter …; half of the people currently employed are below average, and for each of them leaving their job would not cause enormous hardship. … [Therefore] Half of the people should each consider giving up their place for such a newcomer. … If I am correct, a great many people have a substantial moral and personal reason to retire, even if it were thought too morally demanding to expect them to do so. To put it bluntly: for a great many people, the best professional action that they can currently take is to leave their profession.

— Saul Smilansky, Ten Moral Paradoxes, 2007