The Government is being accused of breaking a promise by leaving Aucklanders to find ways to pay for the city's public transport projects.
Labour's transport spokesman, Phil Twyford, says there's a leadership vacuum and ministers have to step up.
Auckland City Council is suggesting an increase in GST, higher petrol prices and road tolls as ways to raise $2.4 billion for an inner city rail loop and other projects.
Prime Minister John Key on Monday signalled the Government wouldn't allow GST to be increased, saying taxes sucked money out of the economy and it was up to the council to figure out how to pay for the rail link.
"The Government is already investing huge amounts in Auckland's infrastructure," he said.
Mr Twyford says the Government plans to spend $1.3 billion on the Puhoi-Wellsford "holiday highway" which could fund half the rail loop.
"National came into Government with 11 key commitments and the second on the list included increased investment in public transport," he said.
"This can't be another broken promise and another missed opportunity."
NZN