His governorship of the Premier League has resulted in those clubs making more money than many of them could ever have imagined so a £5 million bonus doesn't appear to be unreasonable in that context.
He has had a very decent salary. I am assuming, always dangerous to assume of course, that bonuses have been built in. This is an extra, not in his contract. It is the sort of thing you do for someone at work who has been there for 40 years or does a menial job that is largely unrecognised. This is about a very rich man getting an additional payment that is not part of his generous contract. If it was built in to his deal, fair enough but this looks very poor imo.
No politics of envy, he has generated huge sums of money for the PL and transformed it as a business. His salary and inevitable add ons covers that though.