Supposing you're asking the question in good faith, the answer is: the people, democratically. For example: unoccupied/unused properties become commonly owned by the people, and their management and decisions about their use are done democratically by all, therefore serving the interests of the public, rather than that being decided by the owner class, therefore serving the interests of that select few.

It's simple, you start at the top, by imposing a 70% tax on the higher brackets as Cortez wants. If the marginalized group would get too wealthy (straw-man argument), the 70% tax would still do it's job.

https://www.theguardian.com/commentisfree/2019/jan/08/alexan...

Ponder this: the very same economic policies attempted in Venezuela are almost equivalent to those attempted in Norway. The difference is one country had well-functioning democratic institutions and pre-existing prosperity, the other had widespread corruption and limited freedoms. The results are in plain view, and so are the lessons to be taken: democratic social ownership of common riches (in this case, oil) is a good idea, but stress on the democratic part.

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