We're talking about transport here. Local government pays for roading, apart from State Highways. How do you see Aucklanders subsidising rural areas?
If you truly believe that Aucklanders pay more than their share of taxes, you would presumably support the concept of Aucklanders paying for their own infrastructure, since that would result in a drop in Aucklanders' taxes.
And some rural town with a couple of hundred people are paying for their share of state highways throughout that area?
No, I would not. I don't support separating out every different part of the country and saying "stuff everyone else, from now on we only pay for our own stuff". There are plenty of businesses based in Auckland that service the entire country, there is no point in developing a big separation of who pays for what. Tax is gathered from all of NZ and tax is spent throughout all of NZ. What about the infrastructure of Auckland that is used to transport goods from Auckland ports to the rest of the country? What about when you buy stuff in a shop that they get from their suppliers - who happen to be in Auckland? Why the 'us vs them' mentality?
As long as AKL is not treated as the centre of the universe, and that only they contribute. And that the expenditure is shared equally