One does have to ask the question as to why so many elect to travel to this country, at least those with the resources, to have many procedures preformed. I alone have had family members from north of the border, come here for treatment of various conditions. 
 From bypass surgery, to a tumor on their kidney, the wait for care can be extensive.
As can the level of treatment and recuperative care. And I for one agree that single payer is the only way to go, but the other systems all have areas of concern, and your care is still going to be somewhat based on your economic status.
 There will be a level of care provided for average citizens, and that will differ from that given  to let's say our political elite, much as it is now. Also we have had a version of single payer for many years, it's overseen by the VA, and we all know how well that has been going.