That’s a good link, the author has a bachelor’s in philosophy, so that gives it some credibility, and he is providing a nuanced summary of some philosophers’ views on individual wealth. Schopenhauer is the only one to come close to what you’re saying, and he’s famously the most depressed/depressing guy to ever have walked the earth, not that that means he should be discredited of course. As a list this in no way backs up your point about wealth on a societal level. Just because you identify with an idea that does not make it true.