Well, "no money" can make people less happy. Especially, with no regular income.
Money, certainly brings security when saved and spent wisely. Less stress, so it's definitely easier to be happy.
When you can get paid for something you already enjoy doing, then I think it can make the person a little bit happier. It's not a guarantee though.
It also helps reach goals. And that often feels great. Empowering even. So, money certainly does help.