US jobs, really. The concept of sick days / requiring taking time off from some pool always struck me as a) horribly abusive, b) ripe for employee abuse (sick days when not sick), c) bad for everyone (workers work when sick).

I grew up in Switzerland which doesn't have those. And (to prevent abuse...) you are required to have a doctor's note when sick for more than 3 days. Of course, a bunch of commenters find this kind of requirement abusive... (There is no system that pleases everyone?)