Pension Benefit Guaranty Corporation, like Fannie Mae and Freddie Mac, is a case of "too big to fail." At least a number of members of Congress see it that way. And they are planning a push for legislation designed to shore up underfunded multiemployer private-sector pension funds whose result could put taxpayers on the hook for billions, if not tens of billions, of dollars. Sen. Bob Casey Jr., D-Pa., and Reps. Earl Pomeroy, D-N.D., and Patrick Tiberi, R-Ohio, the driving forces behind this measure, seek to shift the primary responsibility of keeping pensions adequately funded from unions and unionized employers onto the general public. It's another example of the bailout culture in action.