I wouldn't even try to make the argument that public healthcare doesn't work. Comparing across systems and cultures (again, obese vs the rest of the world) is tough to do well. I was thinking perhaps some measure of in-hospital mortality would be useful, but even that would be confounded. Perhaps the Massachusetts model might work for in-US comparison to other states, but MA is not really comparable to single payer systems in the rest of the world.

It's a really interesting topic and I wish I weren't at work so I could brainstorm more with you about how to get a clean comparison.