I don’t think people should lose their apartments or starve because they’ve gotten a serious illness. Every worker should get paid sick leave. If they planned to work and set aside time but have fallen ill on that day, then they deserve to be paid. Now if Joe has had a bad case of the common cold for 2 months and refuses to provide proof, obviously it’s worth investigating. But if this is the sixth day Sarah’s been seriously sick, she deserves 6 days of sick pay. Even if she’s a part-time waitress.