I mentioned Napoli because Cheesio had mentiond them first.
Ok, let's say for the sake of argument that you can't ge three quality players for 60 million. Could you get two high quality wingers for 60 million? I would think that you could, and with a midfield rotation then of Pirlo, Vidal, Marchisio, Asamoah, and Guarin is certainly an improvement when you add two wingers of quality.
Juve can't compete with Barca, Real, City, Chelsea on a financial level, so unfortunately, moves like Pogba may have to happen. Do I want to see it happen? Of course not. But that's the harsh economic reality of it. Juve will eventually need to sell players like Pogba in order to fill out other positions of their squad. Might as well do it while the iron is hot.