Each manager has a preference, look at Gerrard, he doesn't play with wingers, so gets rid if most of them. Smith bought Emi and Bailey, yet Gerrard would rather play Coutinho ings and Watkins in the 3 forward places.
New manager might want to play 5 at the back, or 3 up front. So Gerrard could spend another 80M only for another manager to come in and they don't fit his style of play.
We then go again....