The Institute For New Economic Thinking has the article The Forgotten Vision of Market Socialism.
200 years after Marx’s birth, a look at how two economists sought to reconcile his idea of common ownership with market mechanisms
I have thought that if the Social Security Trust Fund were able to invest in stocks rather than special government bonds, this ownership could lead to some of what is described in this article. It might be instructive to put these two ideas together.
The idea about Social Security was described in a previous post Saving Capitalism For The Many, Not The Few. Also see the previous post Adapting Society To The Age Of Robots. Or just look through my previous posts that mention Franco Modigliani,