http://www.democraticunderground.com/discuss/duboard.ph... William Greider in the interview linked above explains it in much more detail and much more artiulatly than I can.
Short answer though is that they supported the same agenda of privatization, defacto deregulation and other policies that have hollowed out the American economy, weakened the middle class and poor and enabled the frightening monopolization of corporations. They are acolytes of Alan Greenspan, who was an acolyte of Ayn Rand and Milton Friedman and the "Chicago School" of ultra free market economics.
It was a disaster that came to full fruition after Bush took over.