First, Obama does support SS/MED reform. GOP intransigence regarding the "No New Taxes" pledge as well as stubbornness in the far left of the Democratic party is blocking proposals like Simpson-Bowles from coming to fruition.
Second, the deficit is declining considerably as a % of GDP and likely will continue to do so.
I think things are going OK as they are.
Taxes are at 18% of GDP and rising. The last time we hit 20%, the economy took a tumble and manufacturing was annihilated. New taxes are out of the question, unless you're a riverboat-gambling socialist who prefers deadweight loss to economic growth (e.g. Obama).
Obama is known for saying hands off of entitlements. It's true that Republicans aren't much better, but at least they don't champion their underhanded vote-buying of the over-65 demographic. Obama is not interested in reforming anything, only expanding the current problem. See: ACA