World income is irrelevant since I live in a nice part of America, not the world. And yeah, I do make about as much as your and my grandfather made over the course of their careers. Unfortunately, if I'm making an apples-to-apples comparison with people doing equivalent work (perhaps not at Jane Street, but definitely at Google or Facebook) I'm making about 80% or less. That means I'm worth 80% in the eyes of the fair labor market - I'm 20% less human.