Quag accepted a pay cut with Lazio (3 year contract, 1,5m), and even requested a move to Samp, who found it difficult to pay what Juve wanted. He would've perhaps taken a pay cut there too had Juve reduced the transfer fee. He could've gotten a similar salary at Arsenal and thereabouts at Valencia, Villa or some of the other teams, but most players at this stage in their careers consider lifestyle and culture just as much. Vucinic would've been paid similar wages at Arsenal, maybe even more if he pushed them, but he still chose not to go there. It's more than just the money IMO, and I think these player's are entitled to that.
The loss if anything, is theirs. More than the clubs. And overall, some people here seem to be taking offense like Quag, Vucinic or Gio have blocked the arrival of Messi. Nothing really changes in our mercato and it's not like any of them, or Osvaldo, are going to be getting much game time anyway. We are talking about 3rd, 4th and 5th striking options with a coach who keeps his starters out there for ninety mins if he can. For the position of the player on the team, nothing changes if he stays or leaves.