In my opinion, there should be much lower legal or practical limits on how wealthy an individual or a corporation can become. Billionaires and large corporations just gobble up, and decide the fate of, most everything they encounter. Only they can often manage/afford representation on government committees. Only they can hire as many lawyers as necessary, and appeal for as long as necessary, to win any battle. Only they can afford to hire the most popular artists and constantly saturate the world with their marketing campaigns. Only they know that they will always have enough customers and employees, such that they can have exploitative internal policies and rude external customer service without consequences.
Why does a person need more than maybe a million dollars of savings (i.e., enough to have a middle-class family, house, car, health insurance, retirement, etc.), or a large corporation more than maybe a billion (i.e., enough to provide their service at a high quality to a large region)? Why do wealthier people get to act like monarchs/dictators and decide the fates of poorer people? Did they really earn their wealth fairly — through a daily workplace grind, like most people — or are they being rewarded for out-thinking, out-maneuvering, or being willing to do more unethical things than others? How many local people’s lives would have been enriched, how many local companies and jobs would have been created, if a large corporation’s store(s) had been required to close early, because they had reached their sales limit for that day?