Gambling experts have rubbished SkyCity's claims that Lotto is more harmful than pokies, saying just 0.5 per cent of problem gamblers participate in Lotto alone.
Problem gambling groups have expressed concern at Government negotiations with SkyCity which could allow the casino to install up to 500 more pokies.
SkyCity's chief executive, Nigel Morrison, has argued that its pokies, or casino gaming machines, are less harmful than Lotto tickets.
He said he felt "South Auckland mums" gambling at pubs were more at risk of dangerous addiction than casino visitors.
AUT University Professor Max Abbott, who heads the Centre for Gambling and Addictions Research, said these arguments did not stack up.