They literally tried that already. [Edit: to clarify, I mean that although you joke, the liberals actually thought it would be a good idea.] Have you seen The Big Short? It's ultimately a bit liberal, but it's good enough nonetheless.
Oh I am very aware of the fucked state of the US stock market. Moreso than I'd say the vast majority of the US population. There's so many layers of the how fucked that thing is. On of the things I really hate are when people say "the stock market is corrupt." No, no it's not. The stock market is working the EXACT way it was always intended. As a scheme for the rich to steal from the working class. That's it. That's ALL it is.