Because VW is in Bayerns Board. Thats the Problem.
Its from Kicker and Spox the Source.
Like I say the Problem is Winterkorn and VW. Of course noone want to sell the best player to bayern but the coach and Sporting Director cant do anything. VW is shareholder of Bayern, and Bayern granted WInterkorn and VW some rights in the Club. Imagine if they sell him to City, Winterkorn and VW would be in huge Problems. And VW rather see him in their flagship bayern instead of City.
Remember Luis Gustavo ? He was transfered to Wolfsburg smoothly even though they had much higher offers.
Of course I hate the Situation in Germany, but like I say u cant do anything