Buying young English players means they generally succeed at a big club. Lennon, Carrick, Defoe, Dawson, Joe Cole, Lampard, Rooney, Rio, were all bought when they were young and emerging and have all gone on to do very well for there respective clubs.
The ones you mentioned did not move from where they were until they were much older and therefore did not develop.
How is selling Carrick at about 800% profit not successful?! And how is Lennons value rocketing not successful?!?
Its not a coincidence that Chelsea and United have a far bigger base of English players and finished above us in the league.
Our players prefer the European competion, the English lads know what to do in our league because they grew up in it.