Ie: I broke my toe and I have insurance, so I get ER treatment, but that guy who has no insurance and is internally bleeding to death from a street stabbing (and is hispanic, doesn't have insurance and maybe isn't american?) is pushed behind me in line. That is the real life scenario that at least one person is advocating here.
I think as the governments become more starved (not made more efficient by reducing costs, starved by simply cutting funding without optimizing it logically) that important government services will have to replaced with tiered private companies. As regulations are removed, the same thing occurs.
What if a speed of ambulance was built into your insurance? How do you know what response time is right for you and your family (as it will be framed)?