The Princeton economist Alan Krueger has demonstrated that societies with higher levels of income inequality are societies with lower levels of social mobility.

Health and the Income Inequality Hypothesis.

The difference between rich and poor is becoming more extreme, and as income inequality widens the wealth gap in major nations, education, health and social mobility are all threatened.

Inequality saps the economy by draining the buying power of Americans whose incomes have stagnated, forcing them to rely on debt to fund education, housing, and health care.

The idea of solving as huge and long-term a problem as inequality - which, for my money, is the biggest single problem we have here at home - just never gets serious concern from both sides.

If at some level we are all different, at some level we are all the same.