For Liverpool the reason is obvious, they don't have the financial power to purchase WC player whereas Arsenal has Wenger and we know Wenger likes to develop youngsters. If it works out you can look like a genius but if it doesn't you can look like wenger. A couple weeks ago, mourinho said wenger is a failure specialist for not winning any throphies in 6 years but if you want to develop youngsters you have to be patient and hopefully they will come through and if they do hopefully they will stay (nasri, fabregas, RVP ). Player development is more risky than buying ready made player, and if you want them to get better you Have to play them and hopefully they are good enough for your level or you are screwed. Let say we sell mikel and essien and have chalobah in our squad. Ramires is injured and we have to play chalobah as our starting pivot. We can only hope that he is good enough otherwise we can say goodbye to our chance to win important trophy.