Single-payer’s advantage is that everybody is in, nobody is out. It is far more efficient, allows for better outcomes, saves lives, prevents injuries and illnesses, relieves people of severe anxieties and wasted time spent figuring out often fraud-ridden, inscrutable computerized bills and allows for the collection of pattern-detecting data to spot harmful trends.

http://www.commondreams.org/view/2013/09/26-11