Aside from the huge problems correlated with income inequality for which evidence and reasoning are readily available if you look, there's a basic problem with

Aside from the huge problems correlated with income inequality for which evidence and reasoning are readily available if you look, there's a basic problem with the idea that something like inequality could be a net good despite what people tend to think... it's that because the majority of people, who are on the losing side of inequality, despise inequality and that is already leading to huge political ruptures, populism, depression, demoralizing feelings of injustice, etc etc etc. (There are related basic problems with focusing only on "metrics".)