IANA doctor, economist, employer, or politician.
I think there would probably be some sort of cap for fees that doctors receive. OTOH, AIUI, doctors accept lower amounts from insurance companies or HMOs than their ‘list prices’. If there is some sort of malpractice protection (I’m not advocating for or against, here) then that would have to be figured into the calculation.
I think doctors would still make a good living, and I think they’d still have a certain social standing. So I would expect enrollments into medical schools would remain high. And really, I’d like to have a doctor who is in it for passion rather than the money or status.
If we have UHC, then I suspect that the government would help with student loans; either by subsidy, or loan forgiveness.
I think that some doctors may choose to opt out of the system and take private patients. Though I do want UHC, I think that private insurance will still be bought by people who want it, and that those doctors would cater to them.
I have no experience with waiting for services in Canada. I heard a report on NPR that in Taiwan people can get same-day appointments under their generous system.
According to the NPR report, Taiwan’s system is underfunded. IIRC it consumes 6% of their GDP. To fund it fully, they would have to raise it to 8% of their GDP. That’s still less than half of what our system costs. According to NPR the 125-year-old German system requires everyone to buy into UHC, with premiums based on income. So someone who pays a little will receive the same care as someone who pays more. After income reaches something like $75,000/year people may opt out and buy private insurance instead. These people have certain benefits not offered under the government’s plan.
The way I see it is this: Employees who have insurance already pay part of their premiums and their employers pay the rest. These premiums go to myriad private insurance companies. The way I would set it up (again, not being an economist) would be that the employees and employers would pay the same amount, but to a single payer. IME most working people do not use what they pay for. Using myself as an example, I pay (guessing) $50/month for my insurance and my employer pays (guessing) $200/month. When I was unemployed and uninsured I went to the doctor once, and it cost me $140. This year, employed and insured, I went to the doctor once and the total bill (my share plus insurance) was a couple-hundred dollars. So I feel that there would be a surplus in the system to pay for people who are unemployed.
Many businesses do not offer insurance now. Admittedly, these are generally for lower-level jobs. Some though, are through temporary agencies, and others are businesses that hire ‘part time’ employees or contractors. In my opinion, employers and employees would be required to pay into the system as they (most of them) do now. The company itself would not be offering insurance as a benefit. If a company did offer private insurance as a benefit, I don’t think employees should be able to drop it for a higher salary. Call me a socialist if you want.
Again, these are my own, unresearched, non-professional opinions.