problem is glazers are not willing to sell as they haven't milk finish. also they can borrow money using utd shares.
To be fair, the problem is really not the glazers.
They have spent quite a fair amount. You want pogba they give you pogba. You want Maguire, wan bissaka they give you. They do not interfere with much transfer dealings unless it's way way too expensive. They do not even say they want a certain player in the club. They leave it all to the directors, manager, coaches and scouts.