Either way the prices of a ticket would go up. Either from subsidies or from you paying more. I prefer the airlines trying to be more effective and make more money. Especially where it very very rarely has negative consequences.
Its fine you disagree with me @Onelove if you think the airlines should have not called the police when he ran onto the plane without a ticket that is fine. I dont see any situations where you go anywhere that requires a ticket and run past security and refuse to leave that the police or security will not be called on you. How the police handled it is a separate discussion, one in which I am more neutral on and have no strong opinions on.
Here is a link for subsidized flying.
https://www.usatoday.com/story/trav...-much-do-taxpayers-support-airlines/71568226/