What if Martinez is buying all these promising young players to sell them on for huge fees later on, then buy even better ones since he'd have loads of doe? For example:
Stones: £3m, now worth £40m (I know Martinez didn't sign Stones, but he developed him)
Lukaku: £28m, now worth £50m
Deulofeu: £4m, now worth £30m when you take out the buyback clause
Barkley: Free, now worth £45m
Our 4 best players are all worth £155m, which is a ginormous sum. Imagine the squad we could buy with that cash! Martinez would have the world at his feet with £155m.