The rest of the doctors want to get on the same government gravy train that the Medicare scam doctors are on. Having direct access to the US Treasury is very tempting.
On a government program, they will get paid. It will be a miserly amount dictated from above, but they will receive it.
Under the current system they have to employ a bloated office staff to chase and chase their payment from insurance companies who use deliberate stall tactics to stretch their payables out to Net 300.
Corruption of the present system is feeding the future one.