While this sort of action by the union doesn't help matters, it isn't just labour costs that are pushing automakers to Mexico. I'm sure energy prices don't help either.
Still- especially as it relates to the auto sector - I wish unions and automakers would find better ways to come to agreements in a way that both the automaker and worker can benefit. Canada, Ontario in particular, has the some of the best educated and trained workers in the OECD. Trouble is, the automotive world is the very definition of globalization. Having the best workers isn't enough to keep all those jobs here.
As for the record profits - those are needed now to help pay for all the R&D to build cars and trucks to meet ever more stringent safety, emissions, and efficiency needs.
This is the part of the auto industry that I find depressing. At least my car was assembled in Ontario...