There is a certain amount of truth in this, but nevertheless it is better to be rich, albeit with constant stress (from fear of losing wealth), than to be poor with exactly the same stress (from lack of money for everything). However, if a person has enough money for his existence (without frills and luxuries), that is, he is neither rich nor poor, then such a person can be satisfied with his life. Unless he is overcome by greed or envy for greater wealth. But modern society is built in such a way that such a person will look like an anomaly if he is not constantly in the state of a squirrel on a wheel.