Whenever there’s a storyline with quark, they talk about money/latinum.
I remember in one of the next gen episodes that there was discussion about money and Picard said something about how they’ve moved away from money.
So do Starfleet get paid now?
Update: thank you for the quick responses. From what I’m gathering the tldr is that the following is the answer
- Ferengi love for money/not being a post scarcity society by design
- Bajorans being so near their slavery times and not post scarcity yet
- Quark creating an atmosphere of camaraderie/gambling/upgraded replicators/actual food
All this requires some form of currency.
I think Sisko threatened to charge Quark for rent and utilities in one episode as a way to get Quark to do something Sisko wanted.
Quark may be billing Starfleet for his services, but I’m sure he understands how to be in the good graces of his cop landlord.