Now successive Governments have not moved to ban gambling, judging that overall the benefits of allowing people to legally gamble, outweigh any associated harms. In fact Tourism Minister Mark Burton in 2004 proudly opened the the Skycity Auckland Convention Centre.
Not all forms of gambling are equal though, and most gambling experts do say that harm from pokie machines are greater than say Lotto - despite what the Sky City CEO claimed this week.
I suspect the political acceptability of any agreement will come down to how many extra machines are agreed to. If for example, the agreement was for 10 extra machines, no one would get too worked up. As no agreement has yet been reached we don't know what number will be agreed upon. The Opposition claim it could be up to 500.
While 500 sounds a lot, it would increase the number of pokies in NZ by just 2.8 per cent, from 18000 to 18,500. The total number of pokies would still be 6,720 less than the peak of 25,221 in June 2003.
In National's first term the number of pokie machines declined from 19,739 to 18,001 - a decline of 1,738. An increase of 500 at Sky City would still see the total level significantly lower than in 2008.
The number of pokie machines over time can be viewed at this webpage of the Department of Internal Affairs.
So one can make an argument that even an increase of 500 pokie machines is insignificant, considering around that many are disappearing every year anyway. But politics is about perception as much as reality. The average voter doesn't get into arguments of whether a 3 per cent increase in pokie machines is a good exchange for an international convention centre and its associated jobs.
Most voters react on instinct. They react to whether or not they think Sky City is a good or a bad company. Hence why opposition politicians are now accusing it of everything from money laundering to causing child abuse. If Sky City is successfully portrayed as a "bad" company, then any agreement with it on a convention centre will politically damage the Government.
Ironically the greater the political pressure on the Government, the stronger their negotiating strength with Sky City is. They can point to all the criticism of the proposed agreement, and use that to negotiate the numbers downwards. If at the end of the day, the agreed number of extra pokie machines is quite modest, then the Opposition will deserve some of the credit.