I've worked in Aviation for 9 years. 8 of those years I have come into contact with pilots on a Daily basis. When Sitting in crew rooms talking to pilots, a large number of them have told me that they are members of Balpa but at the same time they have exactly said that they are happy. They have implied that if there was an alternative they would opt for that.
This is the reason why I asked my original question. I wanted make sure that it wasn't just the particular airline that I work for or if it is an industry wide issue.