If United want to keep him, maybe Pogba's pay can be increased, but the guaranteed proportion reduced. The remaining proportion will be performance based, including by the team as a whole.
Not worth it. even 275K is lot for him.
If you look at players like Gortezka who is still in 130K a week, Kroos on 200K after an improved contract, Its mindblowing to see how much a player like Pogba gets.
I know Pogba has some marketting value but still 275K a week is a lot.