Money doesn't buy happiness, it makes it easier to do things that make you happy that require money to do.
I'll give you an example of something that made me happy that couldn't be bought with currency or anything else because it happened by chance. I was working one summer in my early twenties as a house painter. The group I worked with was painting the house of a man who played the bagpipes. I love bagpipes. Well one morning we rolled up to his house and were finishing our coffee and having cigarettes and he began playing in his backyard. A beautiful relaxed piece that just drifted and echoed wonderfully into the trees and after a few minutes a mist rolled in as he was still playing. It was magic. You can't buy that. Sure if you had the money you could pay a guy to play and use a fog machine to recreate that but the point is it was priceless and powerful because it happened organically. Those are moments in life being rich or poor makes no difference.
I think everyone who thinks money cant buy happiness should put a few dimes in a high interest savings account for me to test that idea.