The lesson remains the same as it was a decade ago: At low levels, money improves well-being. Once you earn a solid living, however, a billionaire is not likely to be any happier than you are. Yet for the most part, this truth remains hard for people to grasp. Americans work and earn and act as if becoming richer will automatically raise our happiness, no matter how rich we might get. When it comes to money and happiness, there is a glitch in our psychological code.