However, opponents of the 2016 merger have said that simply offering more community input is no guarantee of avoiding decisions that provoke widespread protests.

Newly elected One Nation NSW upper house MP Mark Latham has called for greater community and stakeholder input into parliamentary decisions.

Mr Latham has said this measure would help prevent "rushed, ill-considered legislation and decision-making", such as the greyhound racing ban, lockout laws and council mergers.

Cootamundra MP Steph Cooke has instead backed Premier Gladys Berejiklian's move to reform the government decision-making processes.

"I wasn't the local member at the time of the amalgamation, and it's no secret that I don't believe the voice of Gundagai was adequately listened to. I don't think it's helpful to engage in 'what-ifs'," she said.

"Since being elected in October 2017 I have consistently engaged with my community.

"I believe community engagement and input in government is vital, and I fully support Ms Berejiklian in her move to ensure Parliament and government departments are focused on the people."

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Gundagai businessman John Knight was at the centre of protests against amalgamation.

He said opponents were given a forum to voice their concerns but the government had no obligation to act.

"There were two boundary commission hearings and the people stood up and said very forcefully that this cannot and will not work and we don't want it, but the commission's report did not reflect that," he said.

"It took the one dissenting voice as if that was the majority and disregarded everybody else."

Mr Knight said the amalgamation had prevented him getting finance in 2018 for million-dollar plan to open a new Subway sandwich shop in Cootamundra and create 20 new jobs.

Rural GP Dr Paul Mara, prior spokesperson for the 'Gundagai Council in Exile', said community feedback had not prevented the amalgamation from becoming "an absolute shemozzle".