Firedoglake (FDL) has an excellent piece on the danger posed to Social Security by the "temporary" reduction in FICA. His conclusion is that this "will lead inexorably to killing Social Security" because Congress will never allow FICA to go back up. This doubles the 75 year projected shortfall in the Social Security trust funds which will lead to pressure to cut benefits, probably by means-testing benefits. According to FDL we can say "Good bye, Social Security. You did a great job for 75 years. Apparently, the President is ready to pull the plug on you, if not on Grandma herself."
Update: It will be interesting to see how major advocacy organizations react to this. I will be paying attention.
Further update: I should note that the FDL piece was by Nancy Altman, co-director of Social Security Works so we have heard from one important group. As far as I can tell, the others are silent so far. AARP, I'm looking at you. National Committee to Preserve Social Security and Medicare, I'm looking at you.