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"There is no example of a working socialist country, none."

That's a bit of a red herring, as nobody is proposing that any nation become a "socialist" country. That said, I'll bit: you're correct, there is no example of a working pure socialist country. By the same token, there is also no example of a working pure capitalist county.

It's the "pure" part that's the problem. Mongrel is the way to do... a mix of the best aspects of capitalism, socialism, and whatever other -isms you have laying around.