This is not particularly true. It's not just wealthy Canadians, its the wealthiest of Canadians in general. Most people, even regularly wealthy Canadians, can't

This is not particularly true. It's not just wealthy Canadians, its the wealthiest of Canadians in general. Most people, even regularly wealthy Canadians, can't afford uninsured healthcare in America. We see far more people leaving the US for medical tourism than Canadians crossing the border for healthcare here.