I hope you know that Manchester United had paid like 1.6 billion pounds in debts for being owned by that family. They haven't even brought the club with their money, it's Man U paying the debt every year and the debt still stands tall..
Idk why you are thinking that they are spending on players, it's the money generated by the club not infused by them like Roman did at Chelsea as they are running in losses.. Without those id*otic owners taking money out and the club not having to pay debt, they could have a new/renovated stadium, and who knows may be Man U would have never dwindled in their success..
Newly promoted NFFC are spending money and are bringing in players to rebuild for PL, but after their worst PL season literally, they are talking about signing people other top PL clubs won't even look at... It's the Glazers protests that promted the bids for Casemiro and Anthony which was rejected anyway...