One crew had been surfing BA.com and checking flight tickets for some time - monitoring obviously - and come to the conclusion that "tickets aren't exactly cheap" and "my flights are always been full" so "BA is definitely making money".
Don't know about making money, but...random check on 1 long haul route, turns up an economy seat at just over £400 including taxes for a 4500nm+ journey.
That suggests that PE with 23% more legroom would be 23% more expensive.
Nope, it runs to about 45% more.
Club World with about 92% more space than WT+ should run it at about that price difference and it does 104% dearer.
So it would appear that the only" not exactly cheap" ticket, for what you get, is WT+.