They're trying some retarded version of moneyball where they're signing up a lot of top-end talent hoping 10% of them will pan out. They know most of them will flop.
Issue with that strategy is that young players like that need a stable environment usually with some vets/experienced players around them. Proper leadership.
Without that you'll have what you saw last season. Dumbass players fighting over silly things on the pitch or over some onlyfans girl or some shit as Nicolas Jackson did lol. I don't like Pochettino and don't think he's elite or ever will be an elite manager, however.......I probably was too harsh on him because no one can have success with the conditions he had to work under.
Guys like Pep, Klopp wouldn't even touch a job like that.