I have a theory about this. Controversial, but I think it's solid.
Conservatives hate Social Security because they have the viewpoint, whether they know it or not, of slave owners. And we all know what is done to slaves: they are worked to death or disability. So they cannot stand the presence of a program that allows a worker to leave without having every bit of use squeezed out of them.
The fact that the Social Security money is the workers' money doesn't move them at all: their greed moves them to think it should be theirs, just as they think their employees' lives belong to them.
Now, if someone says this is an extreme view, no one really thinks that way, I reply, 'Action speaks louder than words.' How many times have you had to fear for your employment because you, or a family member got sick and you needed time off? Or had to be available, even during situations like this, or on vacation? Or any number of things like this?
So I think my opinion is valid. And I stand by it.*
*I know there are employers who DON'T have that view, but I'm not talking about them!