If Parliament and the public believe SkyCity has good cause to expand its casino operations, that should be considered rationally and transparently. If the case for a convention centre is convincing, as interested parties claim, then it should too be considered on its merits, not funded by a back-channel policy subsidy.
If the public did end up paying, it would not be for the full price of the SkyCity proposal. Other contenders would have invested part of the cost and their plans might not be as expensive overall.
In effect by changing the gambling law to have an unrelated building constructed at no cost to the public, the Government would undermine economic probity. Goldman Sachs has estimated SkyCity stands to gain $40 million a year in profits if its gaming expansion gambit succeeds. It is the opposite of a level playing field. A return to support for vested interests.
The logic of permanently boosting a private company's profitability for a short-term capital injection is thin. Why not allow SkyCity a second casino if it will fund a new cruise ship terminal on Queens Wharf?
Or support Ngati Whatua's alternative tender if it gets on and plants a tree on top of One Tree Hill? Or grant Lion Nathan a relaxation on liquor advertising laws if it pays for a new hospital?
The Government makes much of the future employment offered by the convention centre, but as the Weekend Herald showed on Saturday, even these job numbers are inflated beyond equivalent or bigger centres overseas. The jobs and tourism boost offered in exchange for a bigger casino would also accrue in large measure through any competing convention bids.
Prime Minister John Key says he encouraged SkyCity to enter the tender round for the convention centre. Yet the casino had been pushing its own convention plans for years, in opposition to proposals for the Aotea Centre zone.
The Key Government has not been afraid to invest in projects it rates as delivering economic growth: highways with dubious cost-benefit ratios, the $50 million for the national cycleway for tourism, the Rugby World Cup.
Surely stumping up part of the cost of a vital public convention centre is a cleaner and more economically transparent solution than changing an unrelated law - and handing windfall profits to a casino which was willing to invest its money in conventions in any case.