I have been through this and got a decent but definitely not life changing pay off. They buy the group mainly to maintain stability and this is a requirement from the Hospital.
The hospital just cares about meeting metrics, their bottom line, and stability. If the CMG can improve metrics, or improve the Hospital's bottom line in many ways, then the hospital will get rid of the SDG for the CMG.
The CMG cares about their bottom line and stability.
So what is the best way for the CMG and hospital to maintain stability? Pay off/buy out the SDG and for the $$$, the docs sign a contract for 2+ yrs. This gives them 2 yrs of stability, nothing changes, the docs are generally happy, the hospital is happy, the CMG makes money, the specialists are happy too.
This gives them 2 yrs to replace any docs that leaves and a good amount will leave for greener pastures once their contract ends.
If not for Stability, SDGs would never be bought out b/c they own absolutely Nothing. CMGs are smart.
They know its easier to buy the SDG than try to replace 100+ docs with Locums that would cost twice as much flying them in. Look at Summa. It would have been much easier to just buy them out rather than the huge political and monetary cost.