To me this smells of: Here you go, take this payrise and prove you can win something before we give you more control over transfers. And don’t rock our cushy boat now.
Good for him, but he really needs to start winning things now.
For me Spurs have reached a plateau they can only get away from by spending more and spending well. It remains to be seen if Pochettino staying can change that in any way.
The problem spurs have is, apart from chelsea, they will be the only club that has a huge anchor around their shoulder in terms of the huge debt the new stadium brings.
Now obviously they might continue to buy gems and develop players, but history sort of says those spells dry out in the end (arsenal in the early 2000's, united, Southampton etc).
The demand of wages and transfer fees has risen so much, that you just can't afford not to pay it any more. They have got their team right now, but in a few years time players will leave, players will get old etc and they will need the money to invest in those new players higher wages and transfer fees etc
Having so much debt tied to a club obviously will have an effect on the wallet, so it will be interesting to see how they deal with it. Arsenal have suffered greatly because of it, and i would argue they will in a better position at the time, due to the fact the competition for Europe wasn't as intense.
and unlike say, us, united etc who have the history to sort of buy the top (or the tier below it) players, spurs don't really have anything to fall back on, apart from their 3 year current spell in the champions league.
They don't win trophies, they don't pay high transfer fees, they don't pay high wages etc so if they are out of europe i can see them struggling, much like ourselves did.