http://www.theatlantic.com/health/a...america-had-canadas-healthcare-system/381662/
The good:
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1. 5,400 fewer infant deaths
2. $1.3 trillion less spent on healthcare
3. 57 million fewer people going without medical care due to cost
4. 50,000 fewer preventable deaths
The bad:
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1. 17 million more americans would have to wait six days or more to see a specialist
2. 4.7 million more americans would use the ER
I'll take it.
Here's a fun, interactive tool to do the same comparison with other countries.
I see no reason to believe #1. The biggest factor in infant mortality is the woman, not the healthcare system.
As for #3, how many more would go without medical care due to a lack of availability? A percentage of Canadians similar to the US uninsured rate get all their care from ERs because they can't get a primary care doctor.
As for the downsides--you're neglecting the number who would suffer with quality of life issues until they got to the top of the waiting list.
And your second downside is also much worse than you're pretending--ERs are for patching up emergencies. You are not going to obtain good quality care for other issues in an ER setting.