Whilst Everton have a very good squad, and at the moment we are very similar, i do believe Everton have now reached their maximum potential with the money they have to spend on players. I also believe there is a real chance that with the right manager we can improve and become a far more attractive club then Everton.
Maybe Moyes is thinking he's done all he can at Everton, and feels the need for a new challenge. He took Everton from being a very average side to being a top 8 side. Maybe he now feels the need to get a fresh start at a top 8 side and push them on to top 4.
I'm not too sure, I don't even think Moyes is slightly interested. But if he was, and he was promised x amount of funds to spend, i could see why he'd be attracted.