The Soviet Union and its allies were 100% being economically suppressed by the west. If the citizens of a capitalist/imperialist puppet state gain self determination and economic freedom through revolution or even by liberal electoralism, they are ostracized and their governments are punished via economic sanctions and/or outright violence. Liberal bourgeois democracies can be either left or right leaning, even fascist leaning, but once they cross the threshold of economic parity, they are no longer worth anything to the capitalist classes that control and influence the world economy.