I'm not sure I'm following the OP's reasoning. How will a purge of social conservatives help the GOP in the wake of a Romney loss? I don't think Romney is really the poster child of social conservatism.
If the argument is that "most" Americans lean left on social issues but lean right on fiscal issues, how does Romney not fit that bill? He's getting plenty of grief from the Right for being, among other things, too squishy on the social stuff.
The US Air Force has started including tax protester literature in the emergency supplies of their aircraft. If the plane crashes in a remote area, the crew is instructed to read the pamphlets and Goalie will be along shortly to rebut them.