If you believe that Social Security will continue to operate in the future “as promised under current laws” the answer is no, the payroll tax cut does NOT impact your future benefits:
http://www.redstate.com/dhancock/2011/12/23/understanding-the-payroll-tax-cut/
Now the REALITY is that as the system implodes in the future due to lack of funding, EVERYBODY will see reduced benefits, and the tax cut probably makes that day closer.
It was kind of a rhetorical question, but why is this not being screamed from the rooftops by the GOP??