Read "Twilight of the Elites." Few are arguing for zero inequality; even anti-inequality crusaders acknowledge there will always be some inequality. It depends on how much, and what that affords the society. The amount we have now is wildly out of balance. We have models that work better in the world, and even in America's past, and should look to those.
No one is arguing for communism anymore (the implications of the poster higher up notwithstanding), except those that are largely irrelevant to the debate.