On the recordDecember 13, 2012
Actually, since 1979, the income, or the after-tax income, of the top 2 percent has increased by about 372 percent, if I recall the correct number, 372 to 378, while, as you say, regular working people, the middle class, their incomes have remained flat. It's actually a redistribution of the wealth of the country.
Source
govinfo.gov




