Yeah I think it's been found that there is a sweet spot for income and happiness. Having billions of dollars won't make you any happier, but I think it's something around $120K per year that provides everything needed to have a happy life without having to stress much about paying the bills.

Unfortunately the vast majority of people fall way below the level of income needed that's necessary to be able to have a stress free long walk and a good conversation that's not about how to make ends meet, etc.