The trouble comes when the individuals start deserting the business enmasse,
It's the same when staff start "disengaging", Airbourne. A snow ball or avalanche effect. Whether it's Ground staff, Cabin, Engineering or Flight. You can get away with, for a reasonable lenght of time, undercutting wages, reducing training, thinning the ranks, not providing the equipment, outsourcing everything. Then all of a sudden management find that they have a "disengaged" workforce.
You can try running "engagement" surveys and seminars as often as you like. Until management have a self-imposed culture change or the QF Board start doing their job, you'll have 36,000 disengaged staff who will unintentionally be "disengaging" the customers.
It's at about this point the CEO will announce to the world - "We have a problem".