I lived in a town full of millionaires, and while I've met plenty who are just as or even more decent than the average person, there's also the ones who would spend 20€ on a piece of cake, but then not tip the waitress. Yet others seem to think that because they're so rich (and in their mind, that makes them important) they shouldn't have to pay for anything, even a penny is a penny to much for them, and the richer they are, the more time they spend whining about expenses. For some people, money is an end in itself, and that's because they have no personality worth writing home about and nothing else to fill their lives with. Nietzsche was exactly right when he said for some utterly impotent people money is the crowbar of power. But ironically, the more power they have, they weaker they become.
As I said initially, I don't mean "all rich people", not by a long shot -- but anyone who is rich and still a fully fledged human being will know even more of the people I'm talking about than I do -- and there's plenty of poor people who are petty, too. Idiocy and insanity don't care much for class. But just because people do something doesn't mean there is a good reason for it, sometimes it's really just psychopathology combined with not having anyone who is strong enough and cares for them enough, and/or no accidents of life, that force them to stop going deeper into their dead end. They need help, not excuses. That is not aimed at the person in the article, just generally.