@richrf,
I'm going to put aside the idelogical arguments against state health care, which are more or less the same the agruments against welfare, medicare, etc, etc. There are practical problems:
1. Is a statistical improvement in health worth sacraficing the health of those at the extremes, such people with rare or expensive to treat conditions who are simply sent home to die?
2. What are the dangers of giving the government control over every citizens health? I think its very possible that, post implementation of a national health care system, there would be a plethora or new regulations affecting diet, excersize, 'bad' habits, etc., simply because an individuals health could rightly be considered a public issue; i.e. to smoke a cigarette is to increase the burden on society, so society can justifiably tell you not to smoke a cigarrette. Imagine the totalitarian possibilities. And yes, I realize that sounds far-fetched at this point in time, at least to some of you, but there is a slippery slope here, as in many other areas of public policy. Precedents can be set and things can turn out very differently than the wide eyes idealists imagine.
2b. Two words, mental health. Imagine the possibilities. Might we have to pass a mental health test to own guns? drive? vote?
3. The most obvious problem, where's the money? The government is already burdened with so much debt, due mostly to social spending (which has really helped the poor right?), that the nation may well enter a period of bananna republic style default/hyperinflation. Is adding trillions of dollars of new liabilities really the best idea? How much of GDP should government activity represent? How much of the nation's wealth should we feed into the unproductive parasite of government? By doing so, we are preventing the future development which might actually improve the lives of people and allow them to afford their own health care, among other things.
Instead of instituting national health care, we should be reforming medical liability law, eliminating subsidies for insurance, pharmaceutical, and other medical related companies, and finally, eliminate (gradually) medicare and medicaid, which are nothing but state monopolies that make the insurance and other companies irresponsible. Also, I believe in the U.S. medical insurance cannot vary from person to person based on certain conditions, like obesity; that's insane, amounts to a subsidy of the ill, and needs ot change. Like everything else, medical costs would fall if we did away with our inflationairy monetary system, but that's another issue.