No. PPL trainees are, in the main, extremely price sensitive. If you think that £450 isn't significant, I'm sure that the PPRuNe fund would gratefully receive your £450!!
As I've said, too many FIs, insufficient customers. It's the harsh reality of 'market forces'.
But whilst there is a surplus of FIs, employers will keep their costs down primarily in order to attract the customer, not merely to maximise profit. All GA costs have risen under JARs and a FI(R) with 250 hours will not be seen as a sensible investment by many RFs/FTOs. However, some of us have turned away highly qualified many-thousand-hour old-and-bold-will-teach-for-free FIs in order to provide some opportunities for newcomers to the game.
(Please don't ask - we've enough to meet our needs right now)