MEGAN MCARDLE: Once Again, We Cannot Pay For Social Security By Ending the Bush Tax Cuts on High Earners. “That’s why I think it’s a terrible idea to juxtapose the Bush tax cuts for the wealthy and Social Security in a graph that implies that the costs are roughly the same size. Not just because they’re not really equivalent–but because we don’t have that money to spend. We’re already assuming that we let those tax cuts go in 2012, and the budget picture is still a disaster.”