The excuse for tipping culture in the US seems to be that wait staff are utterly inadequately paid for their services and that tipping sharpens their priorities.
Do Frontier pay their cabin crew adequately?
Do I want to fly with an airline whose cabin crew are so poorly paid that their priorities are only those passengers who tip?
If there's an emergency evacuation, will tipping passengers be sent down the slides first?
Will my Australian accent result in me being ignored?
And what's the difference between an Australian and a canoe?
(A canoe sometimes tips)