I'm 80 years old and I remember when America's healthcare was the envy of the world. Rich folks and folks well off could pay most of their healthcare cost out of pocket, prices were reasonable. Folks less well off and the middle class could afford health insurance and charities, hospitals and doctors donated and volunteered to free and low cost clinics for the poor folks. Everything worked really well then along came the federal government and invented first Medicare then later Medicaid and America's healthcare system has been on a downhill run ever since. The more the feds screw with healthcare the worse it gets! I have no faith that Republicans will fix anything. Whatever they do it will be Obamacare revisited.
I think both major political parties really want a Single Payer system and they're torturing Americans into agreement to end up like the Europeans waiting in long lines to get critical operations.
I think you're right that the inevitable course will be to a Single Payer system. At the same time Medicare and Medicaid were implemented, though, other factors were at work and the advancement of medicine was making it necessary to open medical care to the less fortunate. It is actually an investment if it is done right.
I guess you didn't see what happened in the 2016 elections? The Concerned US citizens who put Trump into office, will not allow the left to move the healthcare system to single payer, for you can bet that they will rise up, like they did with Japan, and make sure the liberals rue the day... You can bet your bottom dollar on that...