So you think you can buy Messi or players from oil money clubs like Verrati? Why do City/Chelsea/Liverpool never sell us players? What about Bayern telling United to stop sending huge bids for Muller (close to the world record IIRC) because they weren't selling no matter the price. Do you think United will sell us Pogba?
And Pogba being a case in point, a world record and 300k a week (if not more) for a player who floats in and out of games and doesn't put in much of a defensive shift. That's what you have to pay to get a player from a top team.
Like it or not we aren't likely to start dropping 90-100m on single players. In fact we're definitely not, it's not how we're run.