Has communism really failed or did just people do not want it unless they gain from it (opportunist)?

I mean if people just want the rich to become richer and simply take it away from them when the "time" is right? You know people don't want to work instead just get free-ride and get it away from those who earned hard?
Has communism really failed or did just people do not want it unless they gain from it (opportunist)?
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