15th is hardly bottom of the barrel, and no doubt he wasn't that far down when he signed with the Cowboys 5 years ago. Coaching contracts go up too, and several more recent hires aren'tmuch ahead, and some are behind. Of course he was way behind guys like Reid, Payton, McVay etc ... but that's obviously understandable, and those guys aren't available to hire.
It's pretty ludicrous to think a guy that pays some of the player salaries he does is hiring coaches based on saving a couple of million dollars. That's a small drop in the bucket.