D.Siddall1989 I think is quite right.
The quarry must be cared for and provide opportunities in the first team. As Arsen Wegner ago with Arsenal in the Carling Cup where they came from big players like Cesc Fabregas, Jack Wilshare, Ramsey etc.
Here in Spain, you have the clearest example. For many millions spent on R. Madrid (300 million last year) you can not beat players from the youth ranks at Barcelona that have cost 0.
Players of Madrid's youth have to find other teams to succeed such as Juan Mata, who has just signed for Chelsea, Samuel Eto'o, Borja Valero (Villareal), Dani Parejo and Roberto Soldado (Valencia). All ruled out of Madrid.
In the opposite Barcelona, Guardiola trust them and makes them play, has managed to have a dram team.
but what is coming in the future will be even better (THIAGO ALCANTARA next Ronaldinho Gaucho, GERARD DEULOUFEU, world class under 18, Muniesa, ISAAC CUENCA, Fontas, J. DOS SANTOS, SERGIO ROBERTO .. these guys are great .
Especially THIAGO and DEULOFEOU.
Sorry for my bad English, I'm still learning the language.
greetings to all