Jerry is a notorious tightwad, so I'd be shocked if he made more than $5M.
He's ridiculously stupid and cheap when it comes to free agency, but it isnt true with the coaches. I'm not sure where people get this from (other than a comment made by blowhard Rex Ryan last yr)
There's been a number of position coaches and coordinators that were right at the top or at the top of the league in salaries. Just off the top of my head Norv Turner was after the 1992 super bowl win (got a raise for 93 season). Hudson Houck and Ernie Zampese were the highest paid. (Houck two different times), Garrett got a massive raise after the 2007 season and that's why he stayed instead of leaving for a HC job (it's unfortunate that happened). Bill Callahan was one of the top paid OL coaches when he was here. Rod Marinelli was the highest paid DL coach when we hired him. Dan Quinn and Mike Zimmer were both right at the top of highest paid Defensive Coordinators.
Of the head coaches, yes Chan Gailey and Dave Campo were both low paid, but they had not done anything to warrant a high salary. Jimmy was one of the highest paid coaches, Switzer actually was on the higher end. Parcells was the 2nd highest paid HC when Jones hired him. McCarthy's deal when he signed it put him on the fairly well paid end.