You can’t have a list of supernatural hunters without Buffy. She who hangs out a lot in cemeteries. Slayer, comma, The. Killing vampires, thwarting demon plots and averting the apocalypse is Buffy’s calling, but I’ve never understood why it wasn’t her literal job. As in, why the heck does the Watcher’s Council not pay her for it?! Buffy might not have needed health benefits—super healing powers tend to render hospital visits for things like broken bones and stab wounds unnecessary—but would throwing a weekly stipend her way be too much to ask? She saved the world multiple times (or “a lot,” as her tombstone says), but as far as I can tell the Council never sent a dime her way so she wouldn’t have to get a part-time job after her mom died (pause for wretched sobbing... OK, I’m good now).
Really, paying their slayers would be a practical decision for the Council. A slayer without any financial obligations is free to devote herself to killing baddies 24/7, and without the stress that dogged Buffy throughout season six she’d have been much better able to concentrate. Plus, with the exception of Buffy, slayers don’t tend to live that long. It’s not like most of them would collect retirement benefits.