The article does touch on the answer to your question

> Chetty’s pitch to the nation is that our problems have technocratic solutions, but at times I sense that he is avoiding an argument. Surely our neighborhoods can be improved, and those improvements can help the next generation achieve better outcomes. But what of the larger forces driving the enormous disparities in American wealth? Poor people would be better off if their children had better prospects, but also if they had more money—if the fruits of our society were shared more broadly. “I can take money from you and give it to me, and maybe that is good and maybe it is not,” he said. “I feel like there are a lot of people working on redistribution, and it is hard to figure out the right answer there.” To focus on the question of who gets what is also, of course, politically incendiary.