In NZ the minimum pay is I think $13.50/hr. Lots of flying schools hire people on a casual basis and can get away with paying for just the time in the air. No pay for briefs. Only ground school pay is tutoring for theory exams.
Most flying schools offer a wee bit more though..around $20 per flying hour..but are still expected to be around the hangar all day. Grocery money really..this is why so many kiwis hop over to Oz and jump for joy at the pay rates over there.