We have ample reason to believe that financial markets are quite useful. And yet our wonderful financial infrastructure has not yet brought us the harmonious society we might consider ideal. There remains the ugliness of extreme economic inequality, of some who endure hardship while others are pampered.
While some inequality is actually in many ways a good thing, for the motivation and stimulation it provides, arbitrary and extreme inequality poses problems. It is an imperative that people feel society is basically fair to them.