Take a look at the news lately: You have to remember that even though you think someone is wealthy, or that you might see them in an "amazing" car, often times they are not wealthy at all, and in serious debt. Look at what's happened over the past few months...people wanted others to think they could afford large homes, fancy cars, designer clothes...and now many of them are in serious financial trouble.
I think happiness does not stem from money and that both the truly wealthy and those who make lower or moderate incomes are equally happy. I also think that those who are financially responsible are the ones who don't lose sleep at night worrying about money and that would also contribute to happiness.