Changes to Medicare

The PPACA creates new medical practice arrangements medical homes, accountable care organizations and bundled payments.  Bundled payments are also known as capitation.  Doctors are paid fixed sums of money to care for patients. Under these measures, providers are deliberately given a strong financial incentive to self-ration the services they provide. Since doctors get a fixed sum for providing services, the more money they spend on patient care, the less cash left over to flow to their bottom line.
More than 60 percent of doctors are now employees of hospitals and health systems. The new trend. 
Almost two-thirds who signed employment contracts in 2009 were hired by hospitals. This includes half of all doctors leaving residency training.  The president’s plan envisions that the institutions employing doctors will implement strict guidelines to regulate the decisions that providers can make, in order to steer doctors to more “efficient” choices.
Studies show that productivity declines as doctors enter into these staff-model arrangements. Would a salaried worker work harder than a single practitioner who is responsible for their own livelihood?  Why would the new model introduce genuine innovations in how care is delivered that change how it actually improves quality while lowering costs?  The Doc doesn't care as they become salaried workers. 
Most of the enduring innovation in how care is delivered came from start-up companies that pioneered successful new concepts that in time became mainstream.
The final tool that the president implements is an explicit cap on the amount that Medicare spending can grow each year. Obama says that Medicare’s rate of growth can’t exceed 0.5 percent of the rate of growth of gross domestic product. So if GDP grows at 2 percent, Medicare spending can’t rise by more than 2.5 percent. 
The PPACA transfers 700 billion over 10 years to Obamacare to assist in paying for Obamacare.  In it's place a 15 person panel is appointed to cut costs in Medicare.  The taxes cannot be raised to the people receiving Medicare.  The cuts will come from providers, doctors, hospitals.  How many will want to take medicare patients at a reduced cost?  What happens to the cost of the PPACA after the first 10 years?  The cost of 70 billion a year will be borne by the taxpayer.

So Obamacare is saving Medicare.  With the issues above, how does that happen? 

We have 2 physicians in the family, both successful practices.  Both are selling their practice and exiting healthcare.