Erica,
that is because this "Collaboration Pool" is entirely a user-based initiative. We used to have a much smaller "merge group", but with the recent changes to Collaboration, it made more sense to maximize the number of one's collaborators, so this group "exploded" out of that one.
George, it's NOT that they don't care. They very much do, and have listened to and acted on, quite a few user-generated suggestions, with others in the pipe-line. But what you're asking is both too specific a solution (for a relatively small group of users) AND much too dangerous! Enabling someone to automatically accept ANY request to collaborate AND any merge request, is just asking for trouble and a LOT of it.
I have 358 collaborators, and less than a dozen of them are on auto-merge. About 5-10% percent of the merge requests I get are BAD merges. If those were all automatically accepted, we'd have total mayhem, and the thousands of work-hours invested would be lost.