Beyond that, the only advantage single-payer systems have is the lower prices that result from wielding monopsony power. I don't think it's possible to maintain the quality and pace of improvement of health care when people are funding it less than they would be willing to. Health care is expensive because we value it so much that we throw tons of money at it. People try to provide better care in order to get some of that money, and if you take some of the money away, there will be less people advancing the industry, which isn't what people want.