> For instance, treating some types Leukemia require teams of dozens of caregivers over months-long hospital stays. It seems to me that there's no way a market would make that affordable to the average person, and it seems inevitable you would end up with a two-tiered healthcare system.
I think that's a pretty good and fair point. Clearly the healthcare system in Tanzania is more primitive and leads to worse best case outcomes. Or in other words, the best care you get can here doesn't even get close to the best care you can get in the US. In fact, the US probably has the most advanced care in the world.
The downside of this is that it creates a system in which everything is expensive. Doctors only consider the efficacy and quality of treatment, instead of making trade-offs based on efficacy and cost. I think this is a largely a culture issue, though the Hippocratic oath and the litigiousness of American society are certainly contributing factors as well.
> What's so terrible about single-payer? It seems like it's pretty effective at bringing costs down where it's implemented.
Single payer systems result in inflation of costs and creates individual incentive to pursue inefficient options. If my healthcare costs are amortized through payment from primarily other people instead of myself, I don't care how much money anything costs. From an individual perspective, it would make sense to have doctors spend another million so I can live another month.
Moreover, it incentives risky behavior (smoking, getting HIV, etc) because I personally will not have to bear the financial burden of those choices. The only way to get around this would to to institute caps on lifetime medical credit. And if that happened, people would be screaming about "death panels" and such.
I find it hard to imagine a simple and clear single-payer system that would a) provide individual incentives to maintain health b) not impose exorbitant costs on the majority by the few c) fairly allocate healthcare resources to people who would derive the most benefit.