Fun fact: here in Commiefornia, dishwashers make 20 dollars an hour plus tips. La Jolla is a pretty nice place. She may have been making well over that. Unless she was being paid under the table.
That would seem to point to two possibilities:
“...dishwashers make 20 dollars an hour plus tips...”
Who tips them?
I did f&b work for over a dozen years and never heard of tipping the dishwasher. Bartender, busboy, hostess, yes, but not the dishwasher.
Is this something new?