I don't think anyone in the Prem is all that at the moment. Last season any of the Top 6 could have beaten each other, what's changed so much in the past few weeks?
Yet Spurs were still 18 points off the title, what makes you think, without selling players for good value, Spurs are the ones who will strengthen more than anyone else.
Lets say Spurs need a striker, they want a 20goal a season striker, to afford someone like that you'd be wanting to sell 2 or 3 of your other strikers. But then you have no cover, no rotation nothing, so if that new guy got injured, you're screwed. Spurs are looking like they'll make a loss this season, the way to strengthen is to sell players at their peak value, and buy 3 more players who aren't at their peak value, watch their values increase, and do this over and over.
What good is a 30mil Modric if Spurs still can't score next season, you will not come close to the league with the current team, if you're starting to make a loss your transfer funds will be more limited.
This ignores that Utd have already strengthened dramatically and look set to continue doing so, Chelsea have Torres to come back to form, and look set to strengthen maybe all over, City were well ahead of you and are strengthening, Liverpool have commited to strengthening more than Spurs have.
As the transfer window stands Spurs the rest of the top 6 are moving away from Spurs further, not the other way around.
Why the **** would Barca sell Villa / why would he agree to moving?
Why would Barca sell Ibra, why would he agree to moving? yet they have and he did, if a players not wanted, he's not wanted, and frankly when you're on 150k+ a week no matter where you play, playing becomes more important than the money.
Ibra and Villa both had excellent seasons with Barca, just not Messi/Ronaldo/Eto'o epic seasons.