Nothing, as the billion dollars per year in paycuts is sufficient, IMO.

Where the pilots fell short, IMO, is their refusal to cut their pay by that billion per year about two years earlier.

Had DL been more persuasive about the need for pay cuts (and the pilots more accomodating), DL would now have about $2 billion more than it currently has.

DL and the pilots should have agreed in 2002 to a similar paycut in exchange for a significant equity stake (much larger than the one they received last year).

At the same time, DL should have relieved Mr Mullin of his command much earlier as well.

Back of the envelope calculations make it appear that the potential loss of pilot pensions will cost them much more $$$ than the extra two years of pay, but I may be mistaken.