"Poor" and "rich" are very subjective terms and I'm not sold that the more money one has, the more happy he/she will be.
I have known people that didn't have two nickels to rub together yet they were some of the happiest and most genuine people I knew. I know a few people with expendable income and one in particular sure likes to remind me how well he is doing or what latest toy he bought was.
I have an Italian wife, an old truck, and a cute beagle that loves me. I couldn't ask for more.