Having a system where wealth can be problematic is not the same as saying wealth is the problem, it means the system is the problem because it allows wealth to have an unfair advantage to begin with, and therefore is not capitalism (which by definition requires markets to be free, they arent free if wealth can dominate them).
This usually means things like anti-trust laws, and not allowing legal power to be bought. In other words, you cant buy your way out of legal trouble with a better lawyer, fines cant be flat rate fees per offense, and monopolies cant exist, to name a few. All of your points are easily addressed not by trying to eliminate wealth disparity but by addressing these root problems, because if you dont then even when wealth disparity is low you still have an unfair society where someone with even moderately more money can buy themselves out of legal troubles or otherwise take advantage of the system.
Material extraction - with anti-trust laws no one has anymore power to extract than anyone else, free market competition leads to fair prices and everyone pays the same regardless of how much money you ahve.
geo-political: Take money out of politics such that you cant buy yourway into presidency. ITs pretty simple, just outlaw politicians spending **any** money of any kind on campaigning, adjust the amount of money they are allowed to spend to be proportional to the size of their constituency.
tax related and economic wars are moot points as those represents **governments** not people with money. But if you want to address that then just apply the same principles ont he global stage between governments.
Just using banks - Dont require banks, let people store their money however they wish, including open-source techs like cryptocurrency.