Just a few to start;
- Increased crew training requirements
- At the start of it, they had a lot of crew sitting around for many months, doing absolutely nothing (still do. I know of some pilots who went for a nice paid holiday to Florida to do their type rating at the start of it all, and haven't even flown the thing yet!)
- Increase in management positions (you've got a position duplicated twice in a few cases, one for Airbus and one for Boeing)
- Decrease in aircraft utilisation, but many of the overheads are still there (leases, maintenance, etc.)
And that's just what I can come up with looking outside in. Many crew left when they could see the boat had lost it's way. They needed to be replaced, so that goes with your increased crew training requirements.
Existing Tiger crews were never bonded either. That was part of the agreement between the pilots and management.
morno