I want nationalized health care that works. This crisis has shown our existing system is a joke. However, I have always understood that America in particular would be a challenging country to implement it.
First off, nobody can get a firm price estimate. Well, other than it would likely cost a lot. When I say a lot, some economists claim in excess of what the war in the Middle East cost cumulatively, but per year. This could open up a whole can of worms. The tax fallout could be utterly enormous. To keep ahead of potential debt making our dollar worthless, taxes would likely skyrocket. This would likely fall squarely on the shoulders of poor and middle class folk, if history shows us anything. Higher taxation for better social services only succeeds if the rich are compelled to pay them, and I would guess wealthy individuals and their enterprise would sooner up and leave than fork over a dime. Plus, we would also have to depend on our politicians to even competently negotiate rates and a structure that doesn't sink us long or short term. Personally, I don't trust Washington or even local governments to follow through.
Secondly, a nationalized health care system could be repealed outright or at least hampered by political opposition. Imagine conservatives willingly partaking in a system where they help pay for those who can't help themselves. Yeah, I can't either. We would probably need to wait 30 or 40 years before even trying to pass MFA, just to make sure all the old farts are dead who would make it an uphill battle. Citizens and representatives would have to be exhaustively diligent about snuffing out legislation and campaigns to weaken the system annually.
Lastly, there is a concern about our facilities becoming regularly overloaded and the quality of individual treatment declining. If we dump truckloads of cash into subsidizing education for folks who want medical industry jobs, building hospitals, etc... then it isn't really an issue. Though again, think about how your state and federal government operate even under our most efficient leadership. I just don't see it working smoothly unless there are some big changes.
Really that is the overarching theme. You could conceivably pass sweeping healthcare reform, but our government has to maintenance it. Our society would also have to buy into it fairly ubiquitously to function well.
Though I echo what other folks in here are saying about your friend OP, the free market stifles innovation. There is a mountain of research and distressing news you could show him to refute the notion privatized healthcare is even close to optimal.