@bwada @rcbo @aral you're right, though I wouldn't put it that strongly -- there's definitely a tension between the wants of capital and the needs of workers.
But that tension also exists in communism, because you end up with a new elite that can't be democratically removed, and they act as gate-keepers to the capital.
I think that it should be *possible* to have a social democracy that redistributes wealth to those who need it -- and there are societies that come close (eg. Scandinavia) -- granted, their economies are subsidised both by fossil fuels and exploited foreign labour. I think, that if the middle-classes in those countries could be pursuaded to settle for a life of scarcer material goods, and better social connections, then they could reduce their exploitative nature and become a close approximation of social democracy. To me, that seems more likely than a communist system with elites that don't exploit their power