Just checked and a long haul flight from London to NYC in business would be £4300 vs. £550 for economy i.e. it's almost 8 times more to fly business, and that's just for one person.
I can't conceive of ever being rich enough to pay that much - or maybe it's more that I just don't think there is enough value in the (admittedly very increased!) comfort of the business class seat.
I'd rather spend the money on a nice hotel or meals, or travel more often (not very green I know) but curious whether others feel differently.
What about you?