There could be a significant change occurring with WestJet in the near future. Since their inception, they've been proud of the fact that their workforce has been non-union, and all workers are also "owners". That could be changing in the near future as their pilots are now preparing to hold a vote that could lead to the first union in the short history of the airline. If they're successful, it's certainly possible that flight attendants and other staff could do the same thing.
Here's the article.....
They've enjoyed a competitive advantage in labour costs vs. Air Canada, but that may not be the case in future.