The best thing that could ever happen to Canada would get rid of that god awful TN-Visa. TN - Talent Nuke. Completely sucks us dry of people moving to the US.
Alternatively, if wages were competitive in Canada (even considering cost of living and health care) there would be no reason to move. Personally, I'd much rather be in Canada to be near my family but I'd be making 1/2 the wage and have less talent to learn and grow from.
Why are salaries so low in Canada ? Now at least owing to the US immigration fiasco, more labour should move in and salaries should technically rise - but I don't see that happening. Not sure why.
Competitive salaries on par with California or even NYC will have a dramatic impact on the influx of immigrants.