And due to great income mobility in the US those 2 out of 5 Americans don't stay there long. Or they don't have to. http://www.aei.org/publication/some-amazin

And due to great income mobility in the US those 2 out of 5 Americans don't stay there long. Or they don't have to. http://www.aei.org/publication/some-amazing-findings-on-income-mobility-in-the-us-including-this-the-image-of-a-static-1-and-99-percent-is-false/ http://www.aei.org/publication/some-amazing-findings-on-inco...