Agreed. Suppose you have two workers - one an average joe and the other who learns faster, works faster, produces better work, takes less vacation, never gets

Agreed. Suppose you have two workers - one an average joe and the other who learns faster, works faster, produces better work, takes less vacation, never gets sick, never complains, and is willing to accept less pay. Which would you hire? The end of jobs (as in Humans Need Not Apply) occurs when the latter employee happens to be a robot.