I wish we lived in a world in which what Spurs and Pochettino want is all that mattered. In which the target's own preferences and career goals take a back-seat and all of their advisers agree that playing for Tottenham Hotspur is all they should ever care about in the trajectory of their career, and that their clubs could not be more excited about selling to Spurs on the cheap.
But that's not the world we live in. Yes, it is true that we have been excessively conservative in the transfer market recently, but all indications point to Pochettino also being complicit in this, with heavy speculation that Poch has personally ruled out several signings.
The club has to cast a wider net than that. And just because we're talking to 2-300 million worth of talent doesn't mean that anyone at the club - even Pochettino - rationally expects to sign all of them, or that it would be a failure of the club to do so.