> This is unwanted, first because it produces individuals powerful enough to topple the people’s will

Making the government resistant to manipulation is a distinct problem. It's a game theory/mechanism design problem, and its solution doesn't require taking in lots of money. Giving the government more power/money causes people to spend more effort to manipulate it, so any weaknesses are exploited to the fullest extent.

> and second because it is not in the interest of society for wealth to be accumulated rather than moving.

This reveals a significant misunderstanding of how capital works in an economy. None of the billionaires that come up when you type in "billionaires" into Google have access to liquid cash anywhere near the number that shows up next to their face. Their money is invested in productive projects, it's paying salaries and invested in equipment. Concentrating capital is what allows a civilization to take on big projects. As a society we want big projects to be paid for by individuals bearing the risk (skin in the game). In a free-market, capital concentrates in individuals who, empirically, know how to use it well. Spending other people's money is a great way to make sure that money is spent frivolously. You can criticize luxury spending all you want, and taxing that is something most people consider "fair", but you aren't speaking for anyone economically literate when you say that you don't want capital to concentrate. I want it to concentrate as much as it does naturally.