i mean do any of those countries have 1 million people a year show up with nothing and expect to be let in
for example, the UK has a salary/bank account minimum for them to let you in. and so does canada. the same people pushing medicare for all in america would call that "racist"
im not against the system if we can make it work, i just dont really believe we can. how come not even one state can pull this off?
states can't do it because they don't have the negotiating power to take on insurance companies and pharmaceuticals like the federal government can. Economies of scale are a thing. Every state would fail at having an army too, but we do it fine on a federal level.
Immigrants aren't a big deal because they come here to work.
Even undocumented pay taxes on each check, pay taxes when they pay rent, and pay taxes when they buy things at the store. Removing over head and stupid duplicative processes saves money. 1 million doctor's visits is probably still cheaper than all the advertising we have to pay for private insurance and all the employee salary time that is spent navigating the cluster fukk that is the private insurance system.
And honestly if you are really that concerned we should just make it easier for people to have a path to work here for long periods of time without becoming citizens.
I suggest you take time to look into various forms of universal healthcare, because I think most of your fears have to do with single payer, which is when the government owns and operates all of the medical facilities. There are many other ways to ensure that everyone gets healthcare. The australian model is my personal favorite. Countries far poorer than the united states per capita have been able to implement better systems, the biggest obstacle is winning out over the people who currently get rich off of our misfortune.