Last week's admission by the Government that in the year to June 2012, Aucklanders subsidised the rest of the country by almost $1000 a head, will be ammunition for re-elected Mayor Len Brown on his next pilgrimage to the capital.
By my calculations, that adds up to a credit of about $1.6 billion for that year alone which, Mr Brown could point out, would easily cover the Government's share of digging the city rail link, which Economic Development Minister Steven Joyce and Finance Minister Bill English have been reluctant to approve.
The figures come from what the two ministers call the first "snapshot" of central government spending by region. It was commissioned by the Government from independent research group the Institute for Economic Research. Naturally enough, the ministers were at pains to claim the report showed "that taxpayers dollars are being evenly distributed across New Zealand". It doesn't.
It shows, for example, that Wellingtonians, who were in charge of allocating that year's $78 billion expenditure, won the race by a country mile. Government spending in Wellington totalled $24,481 per capita, compared with Auckland's $16,012 and at the bottom of the pile, Tasman's $14,345. This, we're told, is because Wellington is the capital and is the headquarters of many of the Government's core services.
The Wellington-based institute argues that "Auckland had a comparatively small share of per capita spending largely due to its relatively young population and efficiencies in provision of services in a large urban centre". Mr Brown will be tempted to argue that even greater efficiencies are possible if only the Government was more eager to sign up to his public transport revolution.