I'm not sure I agree with you. For every Easy/Ryanair pilot that gets into BA they will be replaced by yet another cadet who is working for peanuts on a temporary contract having paid for their rating.
If BA and other operators started taking applications from non-rated pilots then it would allow pilots from smaller regional operators to move up the ladder, creating spaces at the bottom. The current way this industry is recruiting seems to allow only cadets and type rated pilots any progression.
In the past, BA has always welcomed all experienced pilots and has provided them with a diverse and capable workforce. It is a shame that BA seem to have given in to market forces and decided to exclude experienced non-rated pilots. Hopefully this will change very soon.