Does money corrupt, or is money attractive to questionable people?
I was gonna include a third option about how money is easier to achieve without considering the morality of your actions but that's not really a philosophy as much as it is an objective fact.
Yes. Most people stop making more when they have enough.
People who don't stop are already broken and corrupted. They have nothing better to do. No better idea. No other desire. Than to accumulate more. It's degenerate, sad, to keep wanting more, to feel that hunger when it is already satiated. Like a rat addicted to cocaine, still pushing itself to push the button for more and more.
I keep joking that we should make video games mandatory for millionaires when this subject comes up but I legit think that playing some grindy game or management games would make this type of people less greedy to some degree, because at their core they appeal to our seemingly primal urge of always hoarding more resources.