You gotta ask yourself, why would Delta ALPA expend negotiating capital to ensure that all DCI flying is done at the same rate/work rules, etc. That's akin to stapling them to Delta list which they don't want.

The answer lies with all DCI groups. Suppose you're flying for Pinnacle. Let's say that Pinnacle is getting 15 CRJ-200's from Mesaba. Would you be OK with Mesaba pilots coming on the property? Would you give up your seniority to allow them to come aboard to preclude the whipsaw?

Tough questions and even tougher answers.