I don't think we should entirely conflate Keynesian economics with state capitalism, they are different faces of capital. For Keynesians, the state redirects finances but still allows for independent production. Perhaps the closest the USSR came to Keynesianism was Lenin's NEP, where smaller capitalists had more breathing room, while large-scale manufacturing and industry were firmly in state hands. But I see your point, and nonetheless I'll have to put some more thought behind my thoughts on Keynesianism...I thank you for the criticism!