I also think that his only reason is money. If he only care about the money, then he should pack his bags and go to Man. City. If he is that good he will get more money at Juve than at City, but first he must prove that he deserve the pay rise.
But I still have a feeling that our board want's to send away all players whose agent is Lippi Jr. because I still think that M. Lippi will be back ASAP. Maybe they also tell Chiellini that he needs to find new agent and now Lippi Jr, wants to sell him and maybe he puts a presure to Giorgio, because he wants to get some extra money with this transfer.
But you must be realy stupid to choose Man. City instead of Juve. I would understand him if he choose Liverpool, Chealse or Man. United, but not Man. City.