Social Security Tax

The 2% discount which carried over from 2011 will expire at the end of February.  There was a big fight in Congress as to who was going to make up the difference for the reduced rate so they only agreed to a 2 month extension.  Previously the Republicans wanted the "Federal Workers" to make up the difference by freezing pay through 2013.  I'm sure this issue is going to heat up again soon as the deadline approaches.  Once again I'm sure a deal will be cut but the question is who will end up paying for it?