If you think about it, we humans don't need much to survive; food, clothes, shelter. Anyone in good health should be able to find work that can satisfy those basic needs. Now the question is why aren't we all doing the things we love then?
Fear, we are mostly trapped by fear, fear of ridicule, fear what others will think of us, etc.. If only we can live a life without fear...
Its true, I think above the necessities most people are fairly even in terms of happiness, you can be happy or miserable whether you're a laborer or a billionaire