I live in a border city... I can drive to Michigan from Ontario in a matter of minutes.....
We have a very large amount of American's that come over and steal our healthcare.... From walk-in clinics to Emergency rooms... Go in with a Canadian's name and address and you get treated.
If you watch the Michael Moore movie "Sicko" you can see our local taco bell
We don't have the best healthcare in the world but IMO it works.... (my wife had gallstones, it took 3 trips to the emergency room and lots of morphine for anythign to be done)