He wants to be the highest paid coach in the league, and Jones would pay him.
Clarify; do you mean SP's ego wants the distinction of being the highest paid coach or do you mean he just wants the money that comes along with it?
Either way it's speculation but at least if its the latter it would be logical because most humans want to amass wealth.
Whatever people may think, Cowboys are trending upward with legit shot at 10 wins & playoffs.
Even if they don't make it Jones is unlikely to buy out Garrett's deal, make Payton highest paid coach, deal with the headaches(Bensons threatened lawsuit) that would accompany Payton, when his team finished on a positive note.