There’s a lot. In the late 1800s it started becoming something of a tradition for billionaires to move on to philanthropy after their retirement. J.D. Rockefeller was worth several hundred billion dollars in today’s money. He gave away close to 200 billion of it.
A more modern example that people have brought up is Bill Gates.
If you are feeling it is wrong, then it’s not right for you.
I personally don’t have any problem with age differences. Unless the older person is deliberately taking advantage of the younger.