Two ends of the same street in New York City frame Alex Gibney's argument about American inequality. At 740 Park Avenue in Manhattan lives one of the highest concentrations of billionaires in the country; ten minutes north, across the Harlem River, Park Avenue runs through the South Bronx, the poorest congressional district in the United States, where more than half the population relies on food stamps. Gibney lays out the numbers behind that gap: as of 2010, the 400 richest Americans held more wealth than the bottom 150 million people combined, a disparity that has accelerated sharply over the last four decades. His case is that this is not accident but design, that the wealthy have used lobbying and tax policy to write rules in their own favor. The film moves between the doormen and co-op boards of Park Avenue's Gold Coast and the streets of the Bronx, using the physical closeness of the two Americas to make the distance between them concrete. It closes on the question the whole comparison sets up: what happens to the idea of upward mobility when the game itself is rigged.