Can, but doesn't...
Money can't buy happiness. Its impossible, because happiness is different things to different people. Its a concept that we own, create, evaluate, and change... over days, sometimes months, even over years.
For example, I grew up extremely poor and have been until I became an SP. I was raised needing clothes I didn't have, not seeing the doctor when I shouldve (from the States, didn't always have health coverage..) Of course I was unhappy when my friends wanted to see a movie and I couldn't go because mom couldn't even buy meat for dinner. (We ate a LOT of pasta.) But, on the bright side, I learned how to be happy. Not fake happy, TRULY happy.
So I think being poor can easily lead to temporary feelings of unhappiness because of the restrictions, but now that I'm an SP I sort of notice that even when I have money, it doesn't change anything. I still don't believe in excessive materialism. I put what money I make into school, and the downpayment on a modest home I'll be purchasing in a year or so. If I have a great week where I get a nice, long appointment, I've even been known to throw a hundred or so towards a charity I respect.
Sorry guys, I don't buy myself a lot of girly shoes and all that junk. Why? Because I know better. I know its all just a fad, and I sure as heck can't take it with me when I die.
I say if money controls your life, and its all you want, then look at the fact that half of the children in this world are going to bed tonight without a thing in their stomachs. It really makes me sick even thinking about it. I know what it was like to go to the grocery store when I had my daughter, as an immgrant, with only $8 in my bank account wondering how I'd buy a pack of $12 diapers (the cheap ones, on sale mind you.) I've had to put my hand out more than once in this life, but I also had some of my happiest moments staring into her eyes knowing I wouldn't trade places with some Hollywood mom letting the nanny do all the work.
Thats just life... and sometimes we need to be a little less shallow, and a little more happy and appreciative of health, and all of the wonderful things we have. Thats just my .02 cents.