The April 2017 Washington Post review said that Callahan had "performed a public service by assembling a striking body of information on a fundamental aspect of 21st-century America, a century when the wealth of the average family has stagnated while the wealth of the rich has soared."[6] Callahan predicts that in within the "foreseeable future", philanthropic spending could increase to the point that it would supplant the federal government in "social programs, medical research", and assistance for the poor among many other areas." This would mean that private citizens private citizens would direct the spending, "unsupervised by any public authority", according to Post.[6]