I've had it with our cleaning lady. She does a lot of moving around the house, opening and closing doors, so it seems like she's working, sometimes visiting the trash can to supposedly dispose of dust she's collected, but then the floor is never actually any cleaner than when she started. I've been suspecting that she was inept for some time now, but I finally was able to record a video of her "at work", and I must say that my suspicions were totally confirmed. I'm afraid we're going to have to let her go.
There are excellent moral arguments supporting child labor laws, but there's also a good utilitarian argument: kids are terrible employees.