Not sure what you mean here. A social program CAN be voluntary. A great example is the RR benefits system.
When you hook into one of those unions, you no longer pay into the Fed SS, but rather the union's retirement SS, as it were.
Let us take a vanilla example, on the SS side.
If you opt-out of SS when you turn 18, then ideally you would have been socking away that money for medical needs as they arise throughout your life, into a fund that exceeds the COLA of a government-based social plan, which can NEVER keep up with inflation. When you turn 65? Then you are TSOL if you did not, unless you paid into a private health insurance plan, OF YOUR OWN CHOOSING.
When you retire, any benefits you claim would be with the money you saved (and invested), so you pay out-of-pocket.
ETA: "You need to stop posting so much."
Dude...Man? I have now been posting the least frequently ever in the 10 years I have been here.
Flom!