The progressive features of most state income taxes are not that progressive.
3 states have a top marginal rate of 9%
13 states have a top marginal rate of 7-8%
22 states have a top marginal rate of 5-6%
6 states have a top marginal rate of 3-4%
7 states have no income tax.
"Even among states with graduated tax rates, most systems are fairly flat. In several states, the top tax bracket begins at a very low level of taxable income ($3,000 in Alabama and Maryland). Other states have only a small difference between the lowest and highest tax rates (just 2 percentage points in Connecticut and Mississippi).
In most states, however, credits and deductions lead to some progressivity in the income tax system. In Colorado and Michigan, two states with a flat tax, the top 10 percent of taxpayers still paid about half of all personal income taxes in 2003."
http://www.taxpolicycenter.org/UploadedPDF/1001064_State_Individual.pdfThese flat-taxers always come out of the woodwork during election time. From a federal perspective, the flat tax is a tax cut on the richer people that are better able to pay taxes and it's a tax hike on the poor.
It's a shifting of the tax burden to the backs of the poor and middle class generally.
I also noted this disingenuous nugget from the article:
"When President Reagan cut taxes in 1981, several good things happened. The economy grew, revenues increased, and jobs were created."
Tax rates double every decade due to growth. Reagan's tax cuts created a debt we are still repaying. Reagan raised taxes 7 out of his 8 years in office including the largest tax increase in history.
His tax cuts did not magically help the country grow out of the recession, that was due to Paul Volcker.