Wow, that's profound. An industry with 600k employees made more than Google last year! Next you'll be telling me the banking industry makes more than Microsoft!
Airlines need to make big profits in good years - they lose money like crazy in bad years. I don't know if it's still true, but at one time if you subtracted all the money US airlines lost from the money they made since the beginning of the industry you'd have a negative number.
To the larger point, this is what happens when you pile on a bunch of regulations and then allow industry to capture the regulators. The barriers to entry are raised so high it's impossible to have real competition.