We’ve had captains leave for corporate at SkyWest. It usually doesn’t occur as an FO, but as a CA. I know two guys in my upgrade class who left for that lifestyle. I think it’s the stress that sometimes is involved as acting as PIC at the 121 level. Corporate is generally a lot more laidback, and oddly your work is appreciated more by the paying customer(s). It obviously feels a less like your herding cattle and being hawked for every move you make.

Those guys at NetJets are making 100k+ which is far less than UA, but everything isn’t just about the money.