You are absolutely right about the middlemen/women. But don't forget to mention the doctors, nurses and PAs as well (more on doctors). They have skin in the game and most of the US doctors that I've talked to aren't that keen on single-payer system. The only excuse they have is that it'll flood the system with a lot more patients (I'm sure it can be solved the same way it is solved in Canada et al.) and that the quality of care will be reduced (can't see that rationale).

About the long wait time - I waited from 11pm until 8:30am (discharge) in the morning in ER of Strong Memorial hospital one day for falling and bleeding from my nose (I thought I broke my nose, but luckily, I didn't). I should have answered my pain level was 10 instead of being truthful about it and responding 3. This is not to mention that I got charged $250 from deductibles despite having the insurance.

My sister, who lives in Rochester, NY, is waiting until May 2020 to get an appointment for yearly physical checkup. There's a significant shortage of doctors in rural areas (Rochester isn't even that rural to be honest). And yet, AMA is happily restricting the supply of new doctors by putting up multiple hurdles including exam fees (not to mention the amount of money they charge for each USMLE exam is ridiculous) and requirement to go through 8 years of education when that could have been easily reduced to just 4 for any IM (internal medicine) physician.