Call it “pay as you fight.”

After months of listening to conservatives caterwaul over deficits and health care, senior House Democrats want a graduated surtax on individuals and corporations to pay for another big drain on the treasury: the Afghanistan war.

Three full committee chairmen — including the House’s top tax writer, Ways and Means Committee Chairman Charles Rangel (D-N.Y.) — are backing the initiative together with the chair of the party caucus, Rep. John Larson (D-Conn.), and close allies of Speaker Nancy Pelosi.