Hard to see how one can reduce costs very much after making deals with the two largest input providers, namely the pharmaceutical industry and the American Medical Association.
Any serious health care plan ought to include big increases in the supply of physicians. The job of a GP is an important one, but not one that requires the heavy selection (in part on marginally useful skills like memorization and ability to function while sleep deprived) embodied in the current system. Better to have more doctors with a bit less hubris and a bit more willingness to rely on expert systems.
And, yes, I did just link to Robert Reich.