In the hypothetical world, Superman brings the whole planet to properity and then... he has a problem to find a job, and then he ends up working at the museum.

Why exactly is the person who saved the whole planet required to work? Did the humanity meanwhile evolve beyond the use of "thank you"? How about just asking some volunteers to donate 0.1% of their monthly income to Superman? If just one person in a few thousands agrees, Superman can retire happily.

The problem with the comix story is not just the extreme altruism, but that humanity appears unable to cooperate on Prisonners' Dilemma with the Superman. (I am not saying that's necessarily an incorrect description of the humanity. Just a sad one.)