If the club was deprived of half this funding, it would become insolvent in two years, he said. Alternatively, if it tried to replace this funding, sub-scriptions would have to be hiked to $450 per person. At present, juniors paid $45 and seniors paid $80.
"It can be a nightmare getting that much from people," Mr Banks said.
Mr Tew said Mr Flavell's plan to make sure 80 per cent of gambling proceeds returned to the community they were lost from could stifle sport funding at a national level.
He predicted this funding model would put at risk the Queenstown National Sevens, Maori Rugby inter-regional events and a range of provincial and amateur competitions.
Labour MP Ruth Dyson said the debate over gambling proceeds was like the 1980s loss to sports clubs of tobacco sponsorship.
Submitters, including healthcare groups, charities and sports teams, told the committee the "world was a different place" after the global financial crisis, and community groups depended more on gambling proceeds.
Asked what rugby clubs did to raise money before gambling sponsorship, Mr Tew said "cake stalls and sausage sizzles", and although these small fundraisers were still popular, clubs' finances were no longer boosted by high profits from clubroom bars.
Mr Tew said the place of sports clubrooms at the heart of New Zealand culture was diminishing, in part due to people not drink-driving anymore. Mr Flavell has said he wants to drastically reduce problem gambling, which disproportionately hurts Maori and Pacific communities.