How much salary is enough?

Sometimes when i read about managers or politicians or CEOs’ earnings and bonuses that some of them get when their company reached certain targets i am shocked to see how high these can be.
I am talking 500000 and million dollar/euros salaries here.
But when all their monthly costs are added up they must have something left, right, like….490000 or so?
Knowing that a lot of the world’s people are making (just) enough to pay the bills and save some dollars every month, that is a bit, yeah, i don’t know.
Don’t want to say it is not fair, because they probably deserve what they make, but how would you feel when you have tens of thousands left every month and get even a bonus at the end of the year?
Would you feel okay with it?
Feel ashamed?
Donate to charity?