Because the system on NZBus is Snapper, with Auckland Transport's Hop branding on it.
- AT awards tender for the system to Thales
- Infratil (Snapper/NZBus) shits bricks, complaining that that tender was rightfully theirs, demands a review of the tender process
- Tender process review reinforces the award to Thales
- Infratil bitches and moans again for another review. That tender was THIERS DAMMIT!
- They get told to fuck off again, Thales has the contract.
- They proceed to go "well we're going to just roll out Snapper anyway"
- Auckland Transport has to scramble and manages to force them to do it with the Hop branding, in order to at least try and save the rollout
They did have a pass rolled out for the RWC - it was called the A-Pass and was marketed at tourists only, and worked on trains, ferries and NZBus.
Why did NZBus loose/why are other bus companies not using the Snapper system? Because the other bus companies (Ritchies, Howick & Eastern, Birkenhead) don't want their major competitor NZBus having access to their passenger loading data, for obvious commercial reasons.
Why does Snapper so desperately want in to the Auckland market? Because they are actually focused on the cashless payment side of Snapper. The transport card part is just a way to leverage themselves into that market. That's why you have to go into a retailer to top up, rather than online, or on bus. That way they can push the terminals on more retailers. They actually make their money by holding the (potentially) MASSIVE cash float from all the top ups - and earning interest on it. Supposedly, the Snapper business model falls apart without the volume the Auckland market provides. Under the real Hop scheme, Auckland Transport will hold that float - and the interest earned goes back into AT, rather than the pockets of a private scumbag company.
Summary: rollout has been ballsed up largely by AT having to fight Infratil/Snapper the whole way, rather than concentrating on the actual rollout of the actual system. Supposedly it will be good to go this year. Communication from AT is fucking TERRIBLE though.