annual income of customers who pay for tickets themselves and choose to fly long haul in business or first class? .
Answer is...........ALOFM. which translates to a lot of xxxxxxx money.
Just call up and ask for a First class round trip from your home to some distant place and back. You will

when you find out how much it costs.
There are folks out there with so much money that it does not matter and for them First class is the way to go, good for them.