Then try reading a debate between Eric Novack and Maggie Mahar, filled with references from Ms. Mahar, on the question of costs and adminsistrative efficiences of "public" vs. private insurers. You can decide for yourself.
This quote from the debate is especially for my friend, jbog:
"A number of these articles and studies note that people have had a hard time realizing just how good the revamped Veterans' health care system is (both in terms of quality and efficiency) because they are blinded by an ideology which says that the government can never do anything better than the private sector."