I think a lot of it is optics .If you make a big profit you buy a player off of a club that made a loss and they then a few years later return the favour Doubt much of that money actually ever changes hands its more an accounting exercise . I look on Footballers the same way I look at Horses or runners .They need to look like they can do the Job some footballers look athletic others look like bricklayers .Dont understand the money for Kane he has never gone a full season without getting injured .Grealish looks like a fella if he gets leg trouble he wont recover .Can you insure a Footballer against injury or being written off .