The first issue that comes to my mind is some 30% of the world starting this sort of process, and maybe it moving to 70 or 80% eventually, but many completely ignoring this and using their enriched power to take over other areas, further enriching themselves.
The only way this happens is through strong policy on tax havens, fair wealth redistribution and making it easy for workers to unionize.
The only way to make this kind of policy come to life is to get money out of politics as much as possible: hard limits on campaign funds and contributions. Having more money than you opponents shouldn't give you an advantage.
