Checkerboard hit it on the head.
I saw an Icelandic wet leas crowd do that to an Indonesian airline. The moment the next payment failed to reach the bank a phonecall to the pilots had them sitting around the pool and RPT flights stopped.
Indos soon worked out how to make sure the aeroplanes left on time.
Of course this company will hit the guilt button ... You NEED to go... some poor patient etc.
Bottle of beer in the fridge can fix that though.