Pledge? Is that a pledge pin? On your uniform?

I called my rep and asked about this specifically. He gave me the same answer that I was expecting when I sent you the PM last week.

Nothing nefarious is going on. It's a large event that requires a support structure to operate. The Delta MEC sponsors the charity (fund raising) golf tournament, and the pilot you are referring to has been tasked with organizing. He has also apparently done the programming to handle the incoming donations, and should be on site to handle the inevitable "glitches" that pop up.

Now you are free to disagree with the MEC's decision to put on a charitable golf event, but the proper channel to raise that concern is via your reps. I personally don't have a problem with it now that I've gotten the details - I've seen firsthand how much work is involved with organizing a large event like this, and don't find it unreasonable that we send support for an event that we are sponsoring. YMMV.