I wouldn't totally agree with the statement..rich people are always unhappy. If they're unhappy, it's entirely their fault because they're not trying to be happy. (in my opinion)
People who have little or no money I would say are usually less happy with life. They can't afford to pay the bills...stress. They can't go on holiday...stress. They can't move out of the neighborhood where their car keeps getting vandalised...stress. They can't afford petrol.
Even the most optimistic people in the world would hate that. .
Personally, I'd choose lifestyle..but for my ideal, I'd need lots of money.
I agree money doesn't buy you happiness BUT is sure as hell doesn't buy misery.