But others see the evolving compromise over the payroll tax cut extension  as a bad precedent. “It seems to be yet another surrender to political convenience over fiscal responsibility,” said Robert Bixby, executive director of the anti-deficit Concord Coalition. “If you do it [add to the deficit] for that, why don’t you do it for the unemployment compensation, why don’t you do it for the doc fix? It can really start a slippery slope – which is already pretty darn slippery.”