Technically, SS/Medicare/Medicaid are raised and funded on their own taxes, separate from the discretionary budget. (You can see "income tax", "FICA" and "medicare/medicaid" on your tax bill).
When people talk about the deficit, they're typically talking about the operating budget deficit, which is only funded from income tax and runs on a separate budget from the SS and medicare/medicaid administrations. So it doesn't really make sense to advocate cutting entitlements to address the deficit, they have problems too but they're separate problems.
When people talk about the deficit, they're typically talking about the operating budget deficit, which is only funded from income tax and runs on a separate budget from the SS and medicare/medicaid administrations. So it doesn't really make sense to advocate cutting entitlements to address the deficit, they have problems too but they're separate problems.