Because, yeah okay the touring ghouls get paid for their performances, but what about the ones back at the abbey?

Do they do chores? Help out around the ministry? Take on abbey tasks to keep the wheels moving? (I view the ministry as a very self-sustaining operation).

Give me Ivy and Pebble, who still tend to the gardens and greenhouses and help out with carpentry for repairs.

Mist, who helps with the irrigation and keeping the pollution in the lakes down.

Alpha, who assists with the slash and burn to keep the crops tidy, or fashioning new pieces of iron for the doors and fastenings in need of repair (blacksmith Alpha my beloved).

Aether and Omega, who still run the infirmary like clockwork.

Zephyr, who keeps the archives in check and the library organised.

Cumulus, who's still the abbey seamstress, helping out the Sisters when their garments wear out.

Ifrit, who is something of a domestic god, who's lack of book-learned intelligence is absolutely made up by him being excellent at cooking.

Phantom, when he's home, who runs errands outside the abbey for the Sisters, who all give him a little bit extra pocket money because he's just so damn precious and polite.