I completely agree that given the lack of any other idea, state intervention to tinker and protect both capital and labour is the only way. The amount which it does or doesn't intefere in either or where it sits on a sliding scale between the two is of course the defining attribute of politics over the last 75 odd years. I don't think Marx envisaged state control as a path to Nirvana, I think that lacking any better ideas he just though it preferable to uncontrolled capitalism. In terms of actual deaths it's probably even-stevens between either choice. We're doing the best we can I guess as we blunder through the imperfections of stoicism, greed, fear, avarice, moralism, immorality, contempt, despair and aspiration that defines the human condition in the modern world.