Here's the way this works; always has, always will.

A pilot group picks up flying. Another pilot group says "Hey! That was our flying! I'm on the street because you guys do it cheaper!!! SCAB!!!"

I'm sorry your on the street. The reason your on the street may or may not be your fault. It may be because you got hosed in arbitration and had a valid contract thrown out (not your fault). It may be because you never negotiated a reasonable scope clause into your contract (your fault). Point being...am I supposed to now put myself on the street so you can have your job back?