[IkmoIkmo]

Public bathrooms don't clean themselves like private bathrooms. Particularly in high-volume places (large restaurants, pubs) it can get nasty very quickly. Think sex, drugs, throwing up, people passing out or going to sleep or just acting stupid with feces. Definitely not a useless job.

But it is one of those weird things that survives long past the point of sense, they should just be paid a wage and be employed rather than work on this weird charity-basis. It's a bit akin to waiters in the US working on tips, whereas the rest of the world just pays them a normal wage. The clubs bank on guys with 10 beers in em to both be drunk enough and close to bursting enough to pay for the service.