Krugman: The End of the Middle Class

Since 1973 the average income of the top 1 percent of Americans has doubled, and the income of the top 0.1 percent has tripled.
Why is this happening? I'll have more to say on that another day, but for now let me just point out that middle-class America didn't emerge by accident. It was created by what has been called the Great Compression of incomes that took place during World War II, and sustained for a generation by social norms that favored equality, strong labor unions and progressive taxation. Since the 1970's, all of those sustaining forces have lost their power.
Since 1980 in particular, U.S. government policies have consistently favored the wealthy at the expense of working families - and under the current administration, that favoritism has become extreme and relentless. From tax cuts that favor the rich to bankruptcy "reform" that punishes the unlucky, almost every domestic policy seems intended to accelerate our march back to the robber baron era.