Yes
Democracy as we know it is capitalist, we have democratic capitalism - which I say is a very weak form of democracy
But you just described those democracies as "mature," Eddi. How can they be mature but also "very weak?"
I think this is a major weakness of the socialist case. All the most successful countries are capitalistic. They're certainly regulated in their capitalism and may even have certain socialistic elements. But there is no full-blooded socialist and democratic country today. Nor has there ever been, that I know of.