This interesting article in Vox talks about academic ideas on how to distinguish and measure a difference between fair and unfair inequality. The premise is that there is no moral justification for leaving anyone below the poverty line, even if they are there due to bad choices of their own making. But once out of poverty, there is a need for incentives for people to make effort, make good choices and take the kind of good risks that sometimes pay off for society. There is also a difference between people who are less well off because of bad luck (often the luck of who their parents are) and people who are less well off because they have made less effort or bad choices. Of course, people who are better off because of luck or breeding will tend to rationalize their success relative to others as being due to superior effort and good choices, when in fact they may not be the case. So having an objective way to measure this is an interesting idea. It suggests you could have policies that kick in automatically when some measure of “unfair inequality” gets to a certain level. I don’t quite understand the measure itself, but this is a blog post referring to an academic paper, and I didn’t dig into the academic paper itself.