If govt imposes too many costs on the air carriers, they may have to bail them out later after they go bankrupt.

ABC News:
Airlines required to refund passengers for canceled, delayed flights
"the Department of Transportation on Wednesday announced it is rolling out new rules that will require airlines to automatically give cash refunds to passengers for canceled and significantly delayed flights. 'This is a big day for America's flying public,' said Transportation Secretary Pete Buttigieg"
"DOT will also require airlines to give cash refunds if your bags are lost and not delivered within 12 hours."

NPR News:
"In an effort to crack down on airlines that charge passengers steep fees to check bags and change flights,..."
"Surprise junk fees have become a large and growing source of revenue for airlines in recent years, according to the DOT."