The theory that non-capitalist societies can have thriving long-lasting economies that produce new innovations and lift their people up is pretty questionable so far.
I can't think of a single example where there's not at least a core nugget of capitalist incentives driving things.
Sure, let's layer on some socialist policies, I'm all in favor of turning that dial quite a bit further, but that's turning a dial, not blowing up the whole machine because it's not working quite as well as we'd like it to.
What would be a good way of promoting social / socialist policies in today's current environment? Also, while the idea of an earning cap does not seem to grab you, what about enforcing a cap on a given individual's ecological footprint?
But we can do a lot. We can drastically reduce the potential financial rewards for extracting value from millions of people.
We can set a max income of $300k per person and the rest goes to elevating the poor.
It would pretty much destroy the VC industry though.