So people who live in Auckland pay rates, whether as owners or through rent that pays their landlord's rates. And the council gets the money from the fuel tax (I presume?), so it's just a different way of collecting rates.
So the benefit of the fuel tax is that people who come from outside Auckland pay for road use? Or is the benefit that it discourages car use and encourages public transport use?
What was the original justification behind the fuel tax?