As Romney has said over and over, he and Ryan have no intention to touch programs in a way that would affect those already receiving benefits. So I don't know why you feel SS benefit might be reduced. The benefits and process for cost of living adjustments are well-established.
SS recipients have been clobbered by the Obama term. Remember Bernanke's reasoning about a cost of living? No inflation because commodities averaged by housing (in crisis) = no inflation. Meanwhile SS recipients have to pay for heating oil, gasoline and food. Nice job, Dems!