We have to remember that Pogba is a big part of Juve's pulling power. We need him to build our name, attract new fans, increase our earnings throughout various sponsors and contracts.
If we sell him, all we'll be able to do is to buy a lot of expensive players that won't be WC (many Pogba-sellers claim they'd be). Isco won't come here now and how the hell would he want to come here after we sell Pogba? We need Pogba here, to attract other players. We're already past that moment when we needed to do sideways moves to stay competitive. The all the time mentioned Bayern model doesn't assume selling your best players every Summer. We have to increase the salary cap sooner or later and I hope we'll do it for Pogba. Players like Pogba and Dybala are the faces of the new Juve and they should be for years to come.
We don't need the money from Pogba's sale anyway. The squad is much younger now, all we need is to add a couple of players every Summer and we should be good.