The original contention was just regarding medicaid -- 290 billion compared to a 3 trillion budget, with a > 1 trillion deficit. Entitlements all together add up to about half of the budget. They're big. But the original point was that nobody wants to touch medicare/SS but everyone makes Medicaid the bad guy. Makes you think they're more concerned with demographics and likely voters than budget arithmetic.
EDIT: Watches the downvotes. Chill out guys, it's just numbers. You'll win the house this fall, take it easy on HN.