I am curious as to where you are getting the idea that "unionization in Canada is still as strong as the strongest years in the US". That's pretty much the opposite of my personal experience and observations, and it's not the consensus I've been hearing (which is that organized labour has been at an absolute nadir in the past few decades, as much in decline as in the US). Unions have shrunk, membership are down, political clout is down, and a newly unionized company is a rare bird indeed. Perhaps the high rate of unionization in the public sector skews the stats here, because in the private sector, things are pretty much a mirror of the US situation.
From what I can tell, all of the same factors that are driving down wages in the US - increased consolidation, far more 'temp' positions brokered by temp agencies - apply to Canada as well, and have had the same effect.
From what I can tell, all of the same factors that are driving down wages in the US - increased consolidation, far more 'temp' positions brokered by temp agencies - apply to Canada as well, and have had the same effect.