“The failure of competition is evident in the large and inexplicable differences in cost and quality for the same type of care across providers and across geographic areas. Competition does not reward the best providers, nor do weaker providers go out of business. Technological innovation diffuses slowly and does not drive value improvement the way it should; instead, it is seen by some as part of the problem. Taken together, these outcomes are inconceivable in a well-functioning market. They are intolerable in health care, with life and quality of life at stake. They are unsustainable in a sector that consumes a large and growing portion of the national budget.”