And who's to say he can't be persuaded by some green bills either?
The concepts of regulatory capture and revolving doors are hardly new or significantly disputed, though. He's worked for Verizon in the past, and I'd fully expect him to land a nice industry job after his tenure. Doing nice things for industry helps a lot in future employment prospects.
He has joked in the past about being a "Verizon puppet" (https://arstechnica.com/tech-policy/2017/12/ajit-pai-jokes-a...) and given his actions I think there's a bit of truth to the joke.