What's wrong with taking advantage of a position of power so long as you are not harming someone? If you are playing poker and get AA, do you fold because you might be taking advantage of your position of power?
Who said anything about it being wrong? I said there's a difference between that and charity. You do understand the difference, right?
Why is him giving you anything beyond the first penny (or whatever significant amount of money to move you from neutral to taking action) any more than charity? It's not your money, is it?
Put it another way. If I end up with a package of $100 on my door, I am happy. But some people, if they find out their neighbors got $1000, are no longer happy about it.