Even though I support the notion that money doesn't guarantee happiness, I can't agree one particular case can be a proof of anything. People are different, and what is not enough(or just is not needed) for one person to be happy can be just the right thing for another. I read somewhere that there is a threshold, a certain amount of income per year, after which getting more doesn't make you happy, but up to this threshold every additional $200 make you happier.

Since we are in the Economics section, I think it's worth reminding that money is the blood of economy. Let's respect it.