> That shows a very inefficient use of USA's wealth and a very poor healthcare policy.
Actually it doesn't.
Suppose we compare the lifespans of Japanese-Americans to Japanese in Japan. Your theory predicts that Japanese-Americans will have a shorter-lifespan. Reality says otherwise.
The populations are different. The US is incredibly diverse, and much of that diversity is correlated with geography. Japan, not so much.
Are you saying that it's genetic or that it's cultural (e.g. food, exercise and lifestyle choices)?
I think in America you also have to account for socio-economic status more than in other first world countries. Also where do Japanese-Americans tend to live? I find it hard to imagine that immigration is as high in the poorest regions.
> Are you saying that it's genetic or that it's cultural (e.g. food, exercise and lifestyle choices)?
I don't know why it's different. I'm just pointing out that it is, so any theory that predicts otherwise ....
> I find it hard to imagine that immigration is as high in the poorest regions.
I'm often surprised at where I find people. For example, there are lots of Vietnamese on the gulf-coast. I was treated by a Thai doctor in the middle of Ozarks.
> I think in America you also have to account for socio-economic status more than in other first world countries.
Why? Are you assuming that health insurance affects life-expectancy? (The effect, if any, is almost in the noise.)
I'd expect that rich people in New Orleans would have the same exposure to carcinogens as the poor as they drink the same water.
Actually it doesn't.
Suppose we compare the lifespans of Japanese-Americans to Japanese in Japan. Your theory predicts that Japanese-Americans will have a shorter-lifespan. Reality says otherwise.
The populations are different. The US is incredibly diverse, and much of that diversity is correlated with geography. Japan, not so much.