The below article talks about the nearly 67% of healthcare that the federal government already controls (and advocates for single-payer). About 48% is the three large programs.

http://www.pnhp.org/news/2016/january/government-funds-nearly-two-thirds-of-us-health-care-costs-american-journal-of-pub

As you are well aware, not much in Washington is open...

I'd like to rant that free-market is the solution and socialized medicine is the problem, blah, blah, blah but the federal government already controls national healthcare and that is not going to change. Stepping forward (yikes, I sound like a progressive) to single-payer seems to me the only viable solution. I just want the funding sources to be honestly stated and if the costs exceed estimates (shocking) then where is the additional funding coming from.