It will be the airports problem if it continues to effect the airlines OTP (which it is) and passengers chose to fly with different airlines or from different airports (which they are). When lack of rest is a contributory factor in an incident or (God forbid) accident the airport as well as the operator will come under the spotlight.
If the airport want the airlines to operate here and channel the pax through their shopping mall passengers and airlines/employees need to be treated as an asset!
Ivor