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Your Utopian idea of no one is rich & no one is poor has never existed. No one is going to tolerate being equally as poor as everyone else.

sorry to say but this is an actual city in the world, and people are free to live there;-) and they do

If this place existed, nasty invaders that flooded into white countries would be going there instead of here.

They will not flee anyplace they don’t know exist:-)