As a Biz Jet pilot BALPA really does not help us. I have however kept my membership going as I believe we as a industry do need a union. The stronger BALPA is as a union in terms of numbers of pilots the stronger their position is against the companies.
Maybe the answer is to also penalise those who join as cadets on these new deals. When the US pilots faced the issue of "pay to fly pilots" I understand they took harsher measures and the number of pilots willing to sign up to these schemes reduced and companies were forced to go back to sensible T's and C's.