Doctors in Vermont have apparently picked up on the concept that they will be providing most of the savings under Single Payer. Unsurprisingly, they're forming bargaining units to "inform the process."
Here is a philosophical question: Does it make sense to pay doctor groups differentially based on how effectively they negotiate? Should the Vermont Medical Society get paid more then HealthFirst because of the skill of their lobbyist?
That question points out a politically incorrect truth. The process of establishing provider payments isn't really a negotiation at all, it is an exercise in rate setting by the state. That rates will likely be influenced by "negotiators" does not contravene this, it will just indicate a clumsy and poorly thought out ratemaking process.