Sadio Mane earns £150,000 a week (and that's not including any performance-based bonuses and sponsorships) so he could buy a couple of Ferraris every month if he wanted, but there's only so much money someone needs before it becomes unnecessary and it's nice to see people actually do something good with their money rather than just blow it all on overpriced clothes and cars. I'm surprised more players don't do it really as nobody needs the amount of money they earn. I wouldn't even know what to do with 150k a week. £150k a year would make you a very wealthy person in the UK and you'd be in the top 1% on that alone.
You could loan out 9 of the Farrari's - for free - to 9 poor people so they have a way to get to work. Keep one for yourself so you have a way to work.

Of you could probably buy thousands of cheaper cars instead and help even more.
I think the amount of money where happiness doesn't increase is around 80-100,000 -- obviously this is going to be higher or lower based on cost of living as 100,000 a year is like nothing living in NYC while in UTAH it makes you a god.
I was wrong off the top of my head -- the ideal income is 105k per year
https://www.usatoday.com/story/money/nation-now/2018/02/26/does-money-equal-happiness-does-until-you-earn-much/374119002/ is the article and the link to the actual study is here -
https://www.nature.com/articles/s41562-017-0277-0But back onto the topic here.
Great ti see the rich people doing good with their money and helping people, hopefully their usage of money helps put some people, back on the right path to success.