A great source: Physicians for A National Health Program.
Couldn't have made the point too much better myself:
"The U.S. spends twice as much as other industrialized nations on health care, $7,129 per capita. Yet our system performs poorly in comparison [it does on most of the major metrics that physicians use] and still leaves 46 million without health coverage and millions more inadequately covered.
This is because private insurance bureaucracy and paperwork consume one-third (31 percent) of every health care dollar. Streamlining payment though a single nonprofit payer would save more than $350 billion per year, enough to provide comprehensive, high-quality coverage for all Americans"Know Civil Preparedness: A Boatload of resources