Heard about this article and had to look it up. What it does not say, and I do not know if the Air China pilots realize this, but the airline pays for all their training. Plus, they have the job security that once they make captain, unless they really screw up, they are a captain then for the rest of their life. Talk about Job security.

Chinese pilots demand same pay as foreigners - CNN.com

I also found this article, which goes deeper into the complaints, and it sounds like it is more that the local Air China pilots are unhappy in general, and CNN highlighted the part versus the foreign pilots.

Pilot protest - Global Times