An honest Ukrainian gets electricity from power plants built by communists. Capitalism can offer him only the import of energy resources from developed countries.

And it's unclear what "mixed system" you're talking about. This is not Russia, this is Ukraine. Since the 90s, Ukraine has been a 100% capitalist state that bankrupted all its enterprises and sold its factories for scrap metal. If anything has remained there, it is thanks to the support of Yeltsin's Russia and the United States.