The big problem is that Obamacare is nothing like a universal system or even the Canadian system, and it does not address the colossal spending costs.
Also, I think Canada happens to have built its medical system at a bit of a sweet spot time. We have enough people paying enough taxes to give a pretty decent average quality of care (assuming you don't live in the boonies). Too many more people or too little taxes and the system will fall apart.
As run4yourlives said, > There is a reason your health spending is almost double per capita to the next highest nation, and it has nothing to do with your population.
Ditto. Canada and other countries aren't doing that. So in the mean time our skilled workers will keep going to the USA to get salaries 3-5x higher than what they would make and keep on taking the money out of the USA.