"The Flat Tax Is a Fraud"

"Simple fairness requires three things: More tax brackets at the top, higher rates in each bracket, and the treatment of all sources of income (capital gains included) exactly the same.
"Not only fairness demands it, but also fiscal prudence. A truly progressive tax would bring in tens of billions of dollars a year from the people at the top who are in the best position to afford it.
"Regressives are pushing the flat tax as a smokescreen. They’d rather not have anyone talk about the unfairness and fiscal absurdity of the current system."

Robert Reich on his blog denounces flat-tax proposals.