I this is it. You've nailed it. When Rafa revamped the reserves and youths, what he did was get rid of players that weren't good enough for the first team out of the club, instead of them playing reserve team football for mammoth wages. Therefore he had to recruit a large amount of talented kids for small amounts with the hope that maybe one or two would make it. This is the reason why we have Shelvey, Suso and Sterling for less than £3 million. In 4 years the 3 combined could be worth 20 times that.