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should we redistribute these goods so that everybody is equal even if that means that nobody will have enough?Of course not. No one ever argues that, because we're all supposed to be intelligent enough to recognize that, whenever egalitarianism is argued for, a baseline (good) quality of life for everyone is implicit. Nobody argues for a society of equally oppressed or equally starving and impoverished people.
. Now I have no problem with someone saying that equality is pragmatically useful, i.e. we should pursue equality ...
I'm not quite sure what you mean when you say "a little carefully managed inequality can act as a useful incentive." Could you clarify?