OP really needs to define "benefits". For example, I got gov't-guaranteed student loans for school. From my understanding of it, the gov't didn't actually pay anything, but would've been on the hook to the private banks if I'd defaulted. But since I paid off my loans (early, in fact), the gov't really didn't have to pay anything for me. Does that count as a "benefit"?
Likewise, SS is a benefit if you receive it long enough. Sure, people actually paid into that system, but after a while, they're no longer receiving "their" money (+ interest) because they've depleted their own contributions - they're just receiving other people's money. So does that count as a "benefit" to the OP?