That's not how ideas work, except in a capitalist system. New ideas about how to better run the world are not allowed because they compete with private interest

That's not how ideas work, except in a capitalist system. New ideas about how to better run the world are not allowed because they compete with private interest of the ruling class. The same is true in pretend-communist States like the USSR, which are just State-capitalist systems, not actual communism (where communism is according to Marx abolition of class, property and privilege... none of which were abolished in Leninist States).