"Let him walk" so to speak, allowing him to interview for HC jobs. Point being, Payton's instant success made Jerruh clingy to anyone his pickled brain thought was comparable.
You cant really prevent anyone from interviewing for a HC job though.
You can incent them to stay by paying them more (which is what they did with Payton when he thought about leaving after the 2004 season for Oakland, or like he did Red Headed Goober to keep him from leaving from Baltimore, St Louis, Atlanta etc etc.
What Parcells and Jones should have done after the 2005 season is hand the team over to Payton and have Parcells move into a front office type role for another season or two.
As for the clingy comment, I think that had to do a lot more with the perception that Jones was going through coaches like George Steinbrenner. Firing people without giving them enough time, even though Switzer, Gailey and Campo all deserved to be shitcanned when they got run off.