Like even in the best of scenarios where the left isn't destroyed but can actually summon some form of revolutionary energy against capital, what is to prevent most capital investment from leaving the country as the winds begin to turn?
Is there good theory out there on how to prevent capital flight? Are there capital controls that don't simultaneously provoke capital flight?
So essentially the extent to which a country still participates in capitalism is the extent to which capital flight it will be a problem. If you maintain a system where you need permission from capitalists to do anything then surprisingly you won't be able to do anything in the absence of capitalists. Thus is the problem with social democracy.