Because the biggest savings associated with single-payer come from reduced payments to service providers, the switch would require American doctors and administrators to work for significantly less than they currently earn. But how painful would those sacrifices be?
Many I know went into healthcare to help people, not necessarily to feather their nests. If the overall emphasis changes from the current model, would not the former make for better healthcare? I constantly hear physicians complaining about how things are currently, the lack of time to diagnose patients properly, the excessive electronic records documentation to collect insurance billings, etc. It points strongly (to me) that they'd like to simply do their jobs and return to their domiciles at the end of a workday with feelings of accomplishment.