The other option is to get as many upper class travel tickets sold as possible, leaving the passenger to decide between cash or comfort. If you can entice enough people to pay a thousand quid extra for a free glass of champagne or two and a reasonable kip, then the folks at the back can pay a bit less and you still come out on top.
It's not just that though, is it? You get:-
Can get to the airport later
Shorter check-in/bag drop
Fast track security
Nice lounge to wait in (variable, VA much better than
BA» ), with food and drink
First on plane, no scrum at gate
Flat bed, can actually have a comfortable flight and sleep if needed or much more space to work if you want to
First off plane
Fast track immigration (variable, and not always needed)
Bags on belt first (in theory).
Arrivals lounge if you need to freshen up before onward journey.
So it makes the whole journey much more civilised and comfortable. You can (or could - pre COVID) get return flights to NYC for around £1300 in business if you wait for the seat sales that pop up every couple of months like clockwork. So not cheap, but not so stupidly expensive that it's not worth considering if you can afford it. Call it 18p a mile and it doesn't sound that bad.