I know, the Watcher’s Council like The Trio with trust funds, too much free time after college, and European accents; a bunch of white dudes (plus ok a few women and POC here and there to round the bare minimum diversity quota :P) who like to think they’re superheroes and play at world saving. They call slayers a “tool”; Buffy, Nikki, all the other girls put through hell are like little action figures to them.
So it kinda makes sense that they don’t want to pay them because that would be, like, acknowledging these girls have needs and are “””human”””. Leaving your slayer starving is inefficient nonetheless but really expected because, again, the Trio with legacy grants and stuff.
I honestly think the council in S6 was quietly hoping that Buffy would eventually die in some quiet, non-world destroying way so they could start new with the next one. Hahaha screw that, Masterpiece Theatre dudes!
To be fair, it looks like some slayers are supported but through living with their Watchers who have the salary; the girls don’t get paid so scratch that being fair part.