Private healthcare is an enormous implicit tax on all Americans and American businesses. Most holistic studies I’ve seen say that Americans will have more discretionary income after single payer, because even though taxes will rise, they won’t need to pay insurance premiums (i.e. studies that aren’t handwavy right wing think tank studies that include a trickle down fudge factor).
Generally speaking, the only center-left people who will see their incomes decline are those who work for insurance companies.
This generation of Americans is weirdly change averse. One of the more prominent objections to Puerto Rico statehood, for example, is the fact that the flag will look different than they’re used to. So I think it stands to reason that a demographic change will need to happen, just not for the reason you’ve suggested here.
Canada’s healthcare “rationing” (actually triage) is certainly offensive to some entitled rich people, and many provinces have waged class wars over ending single payer because of that. However, your post makes it sound like single payer is the reason for these problems. That isn’t at all true.
Canada’s healthcare problems come from three basic sources:
Whenever there is a conservative provincial government, they stack the healthcare board with rightist ideologues who intentionally degrade services in the province in order to promote private or two tier healthcare. This happened in Alberta when the conservatives consolidated the regional health boards into Alberta Health Services. Among other things, AHS concentrated certain specialists into specific hospitals. This meant, for example, you couldn’t get treatment from a cardiologist at just any hospital, but only at one hospital in the region. Some doctors reported having to take a taxi across town with medical equipment in order to treat a patient who couldn’t be transported. This sort of manipulation is pandemic throughout the system.
The second problem is the CMPA. Canada has a medical malpractice insurance/law firm monopoly. This corporation has enormous power, and lobbied successfully for government subsidies for malpractice insurance - a service which, practically speaking, only they provide. The CMPA is a malicious corporation with billions of dollars in their legal fund, staff doctors to share shockingly flexible expert testimonies, and a demonstrated willingness to aggressively defend any Canadian doctor against any complaint or even non-medical criminal accusation. The CMPA makes it impossible to dismiss incompetent or lazy doctors, contributing to both Canada’s healthcare quality problem as well as its quantity problem.
The third problem is the United States of America. They steal our doctors. On purpose. The US can’t educate doctors fast enough to satisfy their own demand. So what do they do? Well, if you’re a Canadian educated doctor, you are something called “dual board certified”. That means a Canadian medical degree is sufficient to practice medicine in the United States. Another thing they have are special visa categories that allow Canadian doctors and RNs (fairly specifically) to live and work in the United States permanently. Combine that with very high doctor pay in the US, mostly due to their own shortage, and moving to the US on a Canadian education is basically a no-brainer.
None of these problems have anything at all to do with single payer healthcare. The only problem that wouldn’t exist under private healthcare is deliberate political sabotage, but it would be replaced with, you know, capitalism, which does things even worse and not even always on purpose.