Why the US health care system is expensive. 

Americans opted for the more expensive options open to them. 

Some opted for low cost. Lots for high cost. Always an option. It would be interesting to see what Canadians opted for if we went private  sector. Probably higher than now since higher cost in the private sector usually means better. But it would be selected by us. And it would not  apply to everyone.  Truly it would be typical of the private sector - you gets what you pay for. 

So enough of this US health care is expensive. Canadian private sector health care cost will be what individuals decide for themselves and their families.