I doubt most liberals would WANT Medicare or Welfare or Social Security or whatever if it wasn't needed. Actually, I dare say many democrats would not want it if it wasn't needed. However they feel it IS needed and that the need for it is strong enough that the government should provide it at the expense of other citizens who don't need it.
What you're saying is not "moderate", what you're saying is a non-hyper partisan democrat view of it. That they'd love not to need them, but we do and thus its acceptable to have the government try to fix it by taking from people what the government deems a "fair share" to instead shift it to the other people.
Like I said, your stance is no more "centrist" or "moderate" than someone who says they really wish we didn't NEED to nation build or invade other countries, but because terrorism does affect us then we need to act pre-emptively to save peoples lives. Just because you wish what you support doesn't NEED to happen doesn't mean you're supporting it any less.