I remember the on the spot fines were so people wouldn't contest fines in court since Myki wasn't sound enough to holdup to legal scrutiny.
The inspectors were just there to scare people into making a quick buck so they wouldn't contest the shaky system the tickets were built on.
There's a real frog and nature theme running through his work. I wonder if he's like a biologist or something and just makes harsh noise goregrind on the side