Many United fans aren't sufficiently aware of the closeness of Pochettino's working relationship with Levy and how much this means to him (Pochettino). He feels hugely appreciated at Spurs - on an emotional level this is very important to him - and understands about the stadium-related financial constraints.
This is what he said 7 months before signing a new contract:
"It's true that sometimes I don't want to be so kind with Daniel because Daniel knows more than me that sometimes we have differences, but I am in love with him. Because he is the type of person who gave me one day, three and a half years ago, the possibility to be here. To be able to write some history for this amazing club, to start to discover a different style of club, a different kind of project. To be here to me is more than a pleasure. I am so happy and my family and that is why I am so proud ... Of course my commitment with the club and Daniel is complete and of course then that depends more on them than me, to be here for 20 years (my emphasis). But of course I think Tottenham is a big club with massive potential. After three-and-a-half years we are always growing and growing."
If the relationship broke down then things might be different, but the relation is solid, Here's what he said 2 weeks ago in relation to the stadium delay:
"The chairman is suffering a lot. He is so tired about work. The last few months he didn't sleep because he is trying to deliver the stadium. I think people don't realise the magnitude of the project and how difficult it is to manage. Everyone is disappointed because we are still not playing there but the day we move everyone is going to realise how massive the project was and how good the facilities are. It doesn't just depend on him. When you build something, you depend on many companies. He is working so hard, too hard, to leave a legacy for ever (my emphasis). And I think that's fantastic."
Or if he felt that Spurs can't go further, then again he might leave. But he has spoken in near future terms about Spurs winning the league title. And we are about to move into one of the best stadiums in world football.
In short, Pochettino is a believer in the Spurs project. He ain't give it up this summer just because United come calling.