[codingmyway]

A better approach might be to just stop them acquiring the things that ordinary folks need in a bid becoming rentier parasites, namely homes.

In a world where food is abundant (for now) that's what keeps everyone else poor. Limit their ability to become greedy landlords and they'll be forced to invest in real businesses and take risks.

This can be started on a local level and enforced easily by only allowing people who live in the homes or community trusts or government to own them.

If some billionaire owns 10 ferraris, has millions in offshore accounts and a super yacht why should anyone else care? It's not taking away from anyone and creates demand for luxuries that wouldn't otherwise exist and create jobs.