If she rewards the honest finder of her $10,000 with a measly $100, I would guess that she probably often stiffs her waitresses and waiters out of any tip whatsoever.
A common observation by those who work in restaurants is that some of the cheapest customers are those who are wealthy but got their meals comped. They are especially bad at leaving tips. The poor and middle class are often far more generous.
In military commissaries, the baggers work for tips only. The military officers are notorious for being cheap skates. The enlisted people are more generous. Doesn’t speak well for the officers, does it? I know the baggers, would sometimes avoid the officers, as much as they could. They knew who the cheapies were.