Those things that you cite as having been lost have nothing to do with comprehensive social insurance. Civil liberties and social insurance are orthogonal.
The sensible thing for the US to do is to look at social insurance schemes around the world and use the experience of others to design one that meets the goals. There's nothing wrong with replacing SS with something better; there is a problem with turning it into an atomic market for individuals in a market of sharks. Social insurance is by its nature a pay as you go... I pay today for the people that need it, and when the day comes that I need, other people will pay for me. The recognition is understanding that the day will come when I do need it.
I can't help but point out that the US is far from the only place where people discover new things about health.
And the point of social insurance is that it is a limited set of freedoms. Social insurance neither helps nor hinders questions of state power over the individual. If the state is bugging my phone, that's outside the scope. That's not to say it's not a problem... but it's not a social insurance problem.