One day my friend's car battery dried up, so she approached a man in the parking lot to ask if he could jump the battery. She had cables in the trunk. He said yes, but when he opened his hood he said he'd just bought the car and wasn't sure he would do it right. So he went over to two house painters eating lunch in a nearby van, and asked them if they could lend a hand, which they did. When they were done, the first man asked if they wanted to be paid, and they said no, and left. He, however, told my friend that he wanted to be paid for helping her, as he'd worked as an agent. She gave him $10.
There was a lawyer who worked at my friend's office, who specialized in estates. He was very well off and brought a lot of money into the firm but didn't work there long. While he did, once a week he could be seen throwing bags of trash out in the dumpster behind the office. This let him avoid paying for garbage service at his home.
Another lawyer at my friend's office, another successful and wealthy man in his late 40s/early 50s, one day complained to his father that the family had spent more money on his sister's college education, who'd attended an Ivy League school. He calculated that his mother and father had spent $39,000 more on her education than his, as he'd gone to a school with a lower profile. He felt he was owed that money and told his father as much. The father gave it to him. My friend knows this because the father, who frequently drops by the office, whispered it all down for her.