Those with money and those without.

Gap between Canada and US life expectancy overall: ~3 years in favor of Canada

Gap between Canada and US life expectancy for top 10% economically: ~0

Life expectancy is a function of demographics, which averages ignore.

Income is also an assertion not supported by data. For simple procedures such as a knee or hip replacement, many people earning under $80K CAD opt for US treatment.

Likely because Canada has extremely bad waitlists which are continuing to deteriorate. That coupled with a lack of specialist medical options and lesser quality.

In Canada, a woman with breast cancer could be waiting 2 months to even start treatment. In the US, you'll be starting next week.