And they always have players coming through from their academy or "cheaper" young players they develop (like Coman). Compared to us they are well drilled machines. So even if they do splash out every once in a while, they've saved a lot of cash.
The German Allegri? I like him, but the rest of the folks will be out with the pitch forks when his team starts playing sideways passes all game. (Other than the Spurs game, which they were unlucky to lose, Chelsea has been mediocre this season)