What do you think how many people are out there who understand Andrew Wiles proof of Fermat's Last Theorem?

I seriously think there is no way that more than say 5 people in the world understand it in its entirety. So theoretically he could have met with these people and made the plan that all of them approve it and than share the money.
NOBODY could do something against it, because for 99,9999% of the population it's impossible to comprehend. And for the rest, who COULD do it if they spend years on it, why would they? It's already approved.