I can't see any connection to that fallacy. The question was about remaining trustworthy when incentives don't align. Being trustworthy when incentives do align means nothing at all though, does it?
People change. Environments can change people--not just incentives. "He was worthy of my trust, and now he's not" is a better framing when encountering new information than "he was never trustworthy to begin with" IMO.
