Reports out of Dallas are that the holdup with McCarthy involve the size of his coaching staff, salary, and contract length. Let's take a look at all three issues.
JJ seems to think the current staff is too big (thus too expensive) and they should do more with less. (It looks about the norm, maybe smaller than some to me.) McCarthy wants to keep it the same or bigger.
Jerry stated in an interview that he wants the coaches' salaries to be incentive-based. He said something along the line of paying them half of what they want as a base, but if they win the Super Bowl they'll get five times what they want. Yeah. That's probably not going over so well with the staff since they have no control over the personnel. Give them a stinky roster, like this year, and they stand no chance to make that money. Coaches tend to coach as hard as they can regardless of the money, but they need good players. If you don't think the coaches are coaching as hard as they can, fire them and replace them.
And as to the contract length, JJ wants it short so if the coaches don't succeed he can move on at a lower cost. The coaches want more guarantee of time to make things work.
I don't think this is trending in the right way for McCarthy to stay in Dallas unless JJ concedes on most, if not all of those points. Coaching tends not to be the reason a team falls short of the Super Bowl. It's personnel. Some pretty brain-dead coaches have made the Super Bowl with a talented roster. Some great coaches have missed the Super Bowl because they didn't have the players they needed.
If you give the coaching staff a blank check and unlimited power to go get the players they want, then fine, make it incentive-based. If you're still the one picking the players, then the coaches are in a bad spot. You force them to make do with inadequate players and expect them to win a Super Bowl. It's not going to happen.
If those published reports are right, then McCarthy will be a free man on Wednesday and likely going elsewhere. You don't need an incentive-based salary for coaches. They're coaching as hard as they can anyway. If they're not, fire them and replace them. As a rule, NFL coaches work 18-hour or longer days during the season. Many end up sleeping in their offices. As workers go, they're the hardest working guys you'll find. They can't do more than they're doing.
Fly!!! Eagles!!! Fly!!!