Finally got around to reading Perfectly Legal by David Cay Johnson, several years late, but at least at the most appropriate time of the year. Great book, despite the flamboyant subtitle, highly recommended. To summarize 300+ pages, there's been a massive redistribution of wealth upwards in the United States since the Reagan years through a slick combination of tax policy and the (non)enforcement of tax policy. Too many people think the opposite is true.
Whatever adverse impacts trade and globalization have had on income and inequality in the US, they certainly pale in comparison to what our elected officials have managed to do on their own.