I think you're conflating wants and needs. All you "need" is nutrition (food and water), air, and temperature regulation. It's reasonable to expand on that to include physiological needs like companionship, shelter and clothing. Sex can also be reasonably included as it is required for the propagation of the species. Everything else is a want. Who are we to dictate what people want to live a better life? What you want to live a better life is quite possibly different from what I want to lead a better life. Wouldn't you agree?