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Near-trillionaires also clearly unrelated.
The inequality in Geneva or New York is MASSIVE. It's a problem. But it's absolutely pitiful compared to inequality in New Delhi or Havana. Plus it's what you keep hearing from ex-Soviets: that apparatchiks and normal people had the same money, but DIDN'T have access to the same stores. Guess which ones had stocked shelves?
The problem communism creates, ironically, is massive inequality.
There is no communism. It doesn't and never has existed. It's just an ideal that that corrupt and powerful leaders can espouse while truly being an oligarchy / authoritarianism. It's also great for capitalist oligarchs to point to as a bogey man.
The fact that everywhere it's been tried ends up as an oligarchy should make this obvious. Can you point to any real communism in the wild? Just like you can't point to a truly free market... They are just ideas, often touted / abused / blamed.