If a player leaves without requesting it they have the remainder of their contract or a portion of it paid up by the selling club. If we can tie him down for another year or two and off him an immediate increase in wages then it won't make much difference when the player leaves, they'll get more money anyway but at least the club will make more on him when they sell him. All depends whether the player thinks about the club though, and to be fair if they're just employees why should they.