Haha - we did pitch the soccer schools idea to Kaka, but this would ceetainly be a different level.
I don't think we could go down the same path with someone like Messi, so readily identifiable as a Barcelona legend.
If I recall rightly, Neymar's £40m signing-on fee to PSG was paid separately, to become the global ambassador for the Qatar World Cup?
Could certainly see Abu Dhabi citing some kind of precedent, front-loading a massive part of his salary as a signing-on fee or giving him a small but significant percentage in the CFG (think about it...)
We would still have to pay him £500k a week salary through our own wage bill, purely for the optics, but the majority of his current earning power could be done well in advance and off the books.
Between us and the bedpost, Sheikh Mansour could push a button tomorrow that would see £50m land in Messi's bank account and another £20m to his dad.
Unless someone hacks Messi's banking details or he fails to pay the tax, there is fuck all our bitter rivals or Uefa could do about it.