Joan Kroc was a dream philanthropist. “The maverick salvationist proved to be a maverick philanthropist, too. She gave away money the way the non-rich fantasize it should be done: no fanfare or foundations, no red tape or robber baron formality. Just the unexpected personal proffer of $1 million to prevent nuclear war, $3 million for a homeless shelter, $100 tips to the immigrants at the drive-through inquiring if she’d like fries with that . . . All the better if the lady in the blue Mercedes got away with her Filet-O-Fish (and a burger for her King Charles spaniel) without being identified.”