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It's because the West never really experienced mass-scale communism. The two things closest to it are: (1) some socialist ideas implemented in rich countries like in Scandinavia, where you pay huge taxes, but at the same time you receive quite a lot from the state in different forms, (2) small-scale communist communes, such as the Longo Maï which, as far as I can tell, still functions since '68, although the spirit is different - and they accept donations, so it's difficult to say the commune is self-sustaining (and nowadays it's practically impossible anyway).