Taxes are already pretty high on premium class seats.
Airline pricing is bonkers. Look at these BA direct Heathrow -> San Francisco return flights I was looking at for the upcoming Feb half-term...
View attachment 119130
A lot of that is not 'true' tax and simply lining the airlines pockets, unfortunately.
I just used some air miles to go to the US in Business class - and paid £650 in tax per person! A lot of this is 'fuel surcharge' and not a tax the government see anything of