The proposals include giving hosts the ability to transfer or even sell gaming machine licences to other operators.
Problem Gambling Foundation chief executive Graeme Ramsey said the commission-based profit proposal cut across the original intent of the Gambling Act which permitted gaming machines in bars as a means of generating funds for a community.
"Under this, a commission-based system, apart from the incentive to maximise revenue at the expense of problem gamblers and gamblers generally, what you're doing there is saying this is a business enterprise."
Labour's Internal Affairs spokeswoman, Ruth Dyson, said allowing the transfer of gaming machine licences "would directly undermine the informed decision-making processes of local councils".
"It would see pokies moved from low-profit areas into areas already battling with problem gambling."
But Hospitality NZ gaming advocate Reg Hennessy said the changes were "critical to ensure that the sector was fairly remunerated for raising significant funds for the community".
Mr Hennessy said replacement of the 37 per cent minimum return to the community meant there was likely to be more money available in grants. " ... it will increase money to the community by somewhere between 3 and 6 per cent."
Maori Party MP Te Ururoa Flavell said a number of Hospitality NZ's proposals aligned with the aims of his Gambling Harm Reduction members bill which is being considered by Parliament.
However, the commission-based payments for bar owners was a real concern from a harm minimisation point of view, he said.
Internal Affairs Minister Chris Tremain, who is on holiday in Europe, was unavailable for comment yesterday.