I wouldn't say ALPA does nothing for the regional carriers. For example - they do a great job of keeping bad pilots in the air. You can do all three of these things and keep your job.

1. Land at the wrong airport
2. Refuse to deice and take off with heavy frost / snow accumulation.
3. Do a quick turn with one engine running.

This was all one person mind you. So yes when it comes to certificate action - ALPA knows what they're doing at the regionals.