It is a consolation for the poor, though. "They might be rich, but I might be happier." Just like "They might be rich, but they are assholes/corrupt/stupid/ugly".
It's not as simple as that. Consider the difference between people who were born rich and those that have worked hard to become rich. It's quite possible to work yourself into an early grave, even if you end up rich.
Because its terribly depressing for many people to admit it.