She’s a hypocrite, because she herself is not able to fairly assess her own natural self-interest but her philosophy expects everyone else to be able to do so.

That seems like a stretch but it’s definitely the best argument I’ve heard. The hypocrisy is in needing social security then, not taking it. I could definitely see some arguments against it, like claiming the existence of social security is what necessitated it, but that’s definitely not as clear cut and I can respect that perspective