Five or six years ago I was flying for a small European operator, now sadly no more. At that time many of my mates, all type rated and experienced on the 737 were out of work. In the summer we had two sun wings 737-800s flying for us, with our cabin crew and Canadian pilots. In the winter we were supposed to take our 800s to Canada, but Sunwings cancelled it. The next summer Sunwings were back flying for us again. I don't recall hearing that a single Canadian pilot had ever said to their management "I refuse to fly in Europe because there are lots of type rated European pilots looking for jobs on the 737".
But maybe I'm missing something. Perhaps Canadians should be able to work in the UK, or Africa, or the Middle East, or China, or anywhere else they can get a work permit, but no one except Canadians should be allowed to work in Canada.
That sounds fair, doesn't it?