Leslie,
I feel your pain!
You stated: "But I also predict that, if doctors decided they were no longer going to participate in government programs,..."

I have two suggestions;
1)politically, join GOOOH.COM and help really change the government.
2)Think about how much better it would be for THE PATIENTS & doctors if ALL physicians in the United States were to refuse to accept payment from anyone but the patient; No Insurance & No Government - actually meeting the needs of people instead of being puppets to support the GREED of INVESTORS.