Aye but how greedy can an already multi millionaire be? He'll have millions stashed/invested all while living the high life with all the material things most people dream of. Lingard could retire tomorrow and probably keep living the good life within reason so he's not exactly needing money now.
He can go to West Ham and get £80k a week over say 3 years so that's another £12.5m in his coffers and more from possible bonuses given their European exploits. Or he could come up to the Mags who have to pay a premium so say £100k which is £15.5m over the 3 years. He'd be about £3m better off, so less than £2m after tax over 3 years.
This is the point I'm making, even if he's 'greedy' he doesn't need that extra sub £2m on top of his multi millions, especially when you look at what he'd have to give up and risk to get it then I'm pretty sure he'd say fuck that