I agree. I know nothing about this woman or her business, but if you can't do a proper interview or...fire someone for malfeasance then you've only yourself to blame.
You're right, you don't.........You're talking about a minimum wage job in a country with universal healthcare.
And you also know nothing about the applicant flow that is probably nonexistant, which puts this employer in a position where she has to hire anyone she can get.