It's not just in the US. When our healthcare system basically shutdown here in Canada for everything but very arbitrarily defined "essential treatments" that may or may not exclude treating things that can kill you but just not imminently, a lot of richer Canadians crossed the borders to get treated at full price (because that's sometimes still better than no treatment if you have even just enough to pay). The rest were stuck with almost no medical care for a full year and a half with no alternative or way to get around it if your treatment didn't make it on the list. So yeah you are right, it's always a matter of class even in places with universal single payer healthcare
