Gov. Sonny Perdue assailed state senators for tacking a tax break for health insurers onto a bill that hikes hospital fees.

The Senate late Thursday voted 31-15 to approve Perdue’s plan to tax the hospitals to help fill the state’s budget gap. But not before adding a GOP amendment that would eliminate the premium tax on health insurance plans when the state’s reserve fund tops $500 million.

Perdue accused senators of bending to pressure from Americans for Tax Reform, a Washington D.C.-based anti-tax group. Perdue says the insurance tax cut has an "unpredictable revenue impact" and needs more study.

Perdue also criticized metro-Atlanta Democrats who voted against the hospital tax saying they’d refused to support a bill that would help vulnerable citizens in their districts.