My notion for a simultaneous attack on three problems: (1) uninsured free riders on the American healthcare system, (2) the unconstitutional individual mandate under ObamaCare, and (3) the problem of illegal immigration: limit the individual mandate to illegal immigrants, the penalty for non-compliance being immediate deportation. Check insured status automatically during all traffic stops, the same way we check auto insurance. Then abolish EMTALA for illegal immigrants.
I realize this doesn't address the problem of uninsured free riders under EMTALA who are American citizens, but at least the poorest of them are eligible for Medicaid, and they're not pouring over the borders. This proposal also assumes it's constitutional to deport illegal aliens who can't prove they have medical insurance, but since they're legally subject to deportation anyway, I don't foresee the Supreme Court objecting.