"...Congress would have to intervene to prevent the withdrawal of providers from the Medicare market" (Hmm, how, exactly?)

http://www.kaiserhealthnews.org/Stories/2012/August/11/faq-paul-ryan-house-republican-medicare-plan.aspx

How Paul Ryan Proposes To Change Medicare

By Marilyn Werber Serafini

KHN Staff Writer

AUG 11, 2012

"Some health care analysts also argue that reducing payments to medical providers could drive them out of accepting Medicare patients, creating access issues for beneficiaries. Richard Foster, Medicare's chief actuary, warned in the 2012 Medicare trustees' report that the health law will eventually lower payments to medical providers so much that 'Congress would have to intervene to prevent the withdrawal of providers from the Medicare market and the severe problems with beneficiary access to care that would result.'"