The problem isn't Prescott, it's the other 5 O players in the top 6 paid and a RB at 15M and a DE at 21M.
These other teams paying QB's in the 30M+, they're not on the hook for as many top 6 paid at their position contracts. How many of those can any team afford before they're in trouble with the rest of their team and depth?
The Joneses either ignored this or thought they could work around it. They have 7 players in the top 6 now with QB, WR1 and CB1 up. They could end up with half the starting lineup in the top 6 paid at their position, what are they going to have with the other half? This is Cap 101 screwup.