English clubs seem to lose their top players so often for such little money. Whereas in Spain, the top players stay with Barca as Madrid for ages unless the club decides its time to sell.
Imagine if Arsenal wanted to sign Xavi. He would have a huge release clause in his contract and Arsenal would have no chance. But if Barca wanted to sign Wilshere he'd be off to Spain in an instant for as little as £20m
On Football Manager I always give my players a big release clause. I think clubs should do this in real life. Man Utd should have had a £200m release clause for Ronaldo as he was the best player in the world at the time.