Waterloo is best at bleeding great Canadian engineers to the USA
Conveniently, you chopped the word "more" off of "more equal society". Kind of unfair to argue against a point the person didn't make.
And there's more to Canada than Toronto. Montreal has great rent prices and a fun-loving tech scene, and a very unique culture. Quebec has $5 a day daycare, free healthcare for all, and McGill university which is ranked as one of the best research institutions in the world despite having the cheapest tuition in North America (although prices for non-residents are quite a bit higher).
If an engineer stays in Canada it's certainly not because they're being adequately compensated.