Arsenal shouldn't offer RVP 150k a week, though I'd be very happy for Arsenal to break this ridiculous "kinda even pay" structure, Wenger has always been intent on keeping it and is entirely responsible for our monumental wage bill, if we put one player on 150k, I dread, literally dread to think what he'll offer Walcott.
But as people have said, if it was about money he'd have left years ago, if he stays to win things and leave Arsenal a winner, he'll do that for £100k, or 150k, its about staying to win, not the money. He'll almost certainly leave though and I have zero problem with him doing so, deserves so much more than Arsenal can provide right now. Barca area a real possibility as I think he'd become a proper Eto'o replacement, IE 30 goals and taking pressure off Messi goals wise and his interplay is excellent, dropping deep and going wide will be fine for him.
Barca have got silly money, as do Real, they only real issue they've had in recent years is the TV companies not paying Barca they money they were owed, I honestly can't remember if they've paid up yet or not but, I'm sure the general idea was they would get the money eventually. Since then they've also turned to a shirt sponsor and if they had to, could persue that harder for a lot more money.