Election staff would face a backlash for demanding voters in the Riverina provide a reason for why they needed to cast an early ballot, according to one political expert.
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The number of ballots cast at Wagga's pre-poll centre increased from 11,640 in 2013 to 18,350 at May's federal election.
Charles Sturt University associate professor in political science Dominic O'Sullivan said there would be "enormous voter backlash" for restricting access to pre-poll centres.
University of NSW law dean Professor George Williams told parliament's electoral matters committee that voters should have to show evidence they are unable to get to a booth on election day
"The system has become so permissive that people can vote early even when they have no reasonable basis for doing so," he stated.
"An exceptional method of voting has become the norm for vast numbers of Australians."
Professor O'Sullivan said he agreed with professor Williams that many early voters were making a choice based on "incomplete information".
"Early voters can't get access to the costings (for each party's policies) but they can get access to other forms of information," professor O'Sullivan said.
"However, they don't get to base their vote on any new policies that are announced.
"In some respects parties are mitigating that by announcing polices early and you now don't get much stuff announced in the final week of campaigning.
"The counter argument is that if people decide that they have enough information to make a voting decision, perhaps that is up to them to decide."
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Professor O'Sullivan said there could be a link between a seat being a safe bet for a particular party and rate of early voting.
"You do have people who declare that they would never vote for a certain party no matter what because their polices are so far removed from that they could support," he said.
More than 500 voters cast their vote at the earliest possible day at Wagga's pre-polling centre in May, with the number increasing every day and hitting a peak of nearly 2750 votes on the Friday before the election.
Electoral laws allow voters to cast their ballots early if they will be unable to attend a polling booth on election day due to reasons such as travel, health, work or their religious beliefs.
According to early voters who spoke to The Daily Advertiser during the campaign, election staff did not ask why they needed to use the pre-poll centre.
Riverina MP and Deputy Prime Minister Michael McCormack said during a speech declaring victory after the federal election that the early voting period should be shortened to one week due to the demands placed on campaign volunteers.