Not sure about one flight, but I earned mine in the Sim last night!
I agree about BALPA needing a reminder about whom they represent and why! From where I'm sitting they appear to have become a management stooge. You might have a hotel room with a trouser press thanks to BALPA (who actually uses those things?), but don't expect them to rattle the cage over salaries.
Answer to problem. Resign from BALPA, form your own company union if your size is sufficient (say over 500 pilots), affiliate with other companies if you're a small company, appoint paid, full time representatives, tell them what you want and let them lose on the unexpecting management. Be firm, realistic, and above all united.
I would be happier parting with 1% of my salary if I KNEW I was being represented properly.