English players are MORE than good enough to play abroad, but more often than not people want to live in their home towns, or play for the clubs they were fans of. ENglish culture is really very different to Italian/Spanish culture which is far more laid back and lets be honest, they speak a foreign language. Half the planet speaks English, very very few English people know Italian or Spanish and it would be far more difficult for people to adapt to play over there.
Older guys like Capello didn't grow up watching American tv, they don't know English as well(ranieri, Ancelloti, countless older guys have issues, younger people very rarely do).
English players simply don't want to play abroad in general, its not about ability, Finnan, and several other really quite crap players have ended up abroad, for them its about not having a preferential option to play in England so take what they can get.
As for the Op, couldn't be more wrong, as someone pointed out Italy have won, and they play mostly in Italy, Germans play mainly in Germany, never effected them in the slightest. Likewise Brazil used to win when they had no part(more or less) in European football 20-40 years ago, these days almost every Brazilian player.
THere is actual proof, simply by looking at whose won, as to how where you play and number of foreigners involved makes ZERO difference.
Something Southgate managed to think up, and completely ignore in his column was pretty interesting and hilarious he missed it.
He mentioned specifically that other countries have had succesfull managers for international teams, from ex players who were also successfull on the international stage.
Then he said we should keep Capello, who was part of a Italy team embarassed at the world cup and left being attacked by the press/country as being a pathetic showing.
But I did think it was very interesting, Dunga's not really got any experience, except at an international level as a player and yet has put together a working interesting team with the right balance with a great chance to win this world cup. There have been many other managers who've won World cup's and Euro's, who used to be successful players on the international stage.
Complex tactics and systems, trying to impose some quick authority by being overly strict and banning things during tournaments, its nonsense frankly, and it would seem to me what works at club level does NOT work at international level.
Thats not to say that we HAVE to have a manager whose won a world cup or a Euro, obviously a good adapative manager or a manager whose particular style suits the international setup, someone who keeps it easy to start with and has his players respect.
But someone who has done well with their international team, will have experience of how their manager at that point ran an international team, something Capello's never experienced, so you have to wonder exactly where he's going to draw his experience from, his team was a total flop that performed not as a team, but a bunch of individuals, with no balance and no quality and went out at the group stage I believe, when the individuals and success of those players was thought to be good enough to challenge for the cup.
Maybe we should be looking for someone who has at least seen what CAN work at the international stage, something Capello hasn't.