FFP workaround innit, hoard players and sell them for a profit.
(Also, still half expecting a few of them to make the grade at Chelsea, players breaking through in their teens is increasingly rare these days, mass loans and then bedding in at 22/23 seems to be more regular (Kane, Lingard etc) quite a few of Chelsea’s dominant youth sides are reaching that stage at the minute so it will be very telling, departures of Ake and Solanke don’t bode well though…)