I'm not doubting you've heard someone at the club tell you that officially, but it begs the question why has no other club have "run the numbers" and come up with the same idea.
I can actually grasp the fact that £50m per year extra income generated on a four year contract might be feasible, but you'd then be in a situation where there becomes a second tier of the transfer fee i.e. £200m (cos it pays for itself) and another £20m cos Utd/Chelsea etc might start sniffing and indeed might offer £200m + £30m and so on.