澳大利亚维多利亚州议会上议院通过立法，废除了长期使用的团体投票单制度[1]。这一改革将深刻改变上议院的政治格局，使依赖偏好协议的微型政党面临重大冲击。维州是澳大利亚最后一个采用该系统的州[1]。
根据分析预测，如果改革在2022年前已实施，绿党上议院议席将从4席增至8席，工党和联盟党各增加1席，而长期依靠偏好转移的微型政党将从7席大幅下降至1席[1]。选举分析师Antony Green指出该系统"扭曲了选举结果"，改革"有利于争取选票的政党而不是依赖偏好的政党"[1]。
对于改革影响的评估，各方观点不一。一国党参议员Rikkie-Lee Tyrrell表示改革可能使一国党受益但不会产生重大影响[1]。然而，射手、渔民和农民党议员Jeff Bourman则认为一国党可能成为上议院最大党[1]。大麻合法化党议员David Ettershank批评改革将使上议院更加保守，称其"锁定大党垄断"[1]。
Victoria's upper house has passed legislation abolishing the group voting ticket system, a mechanism that previously enabled micro-parties to secure parliamentary seats through preference agreements despite receiving less than 1% of primary votes.[1] Victoria stands as Australia's last state to operate under this electoral arrangement.[1]
Electoral analysis suggests the reform will significantly reshape the chamber's composition.[1] If the system had been abolished before the 2022 election, the Greens would have increased their upper house seats from four to eight, while Labor and the Coalition each would have gained one seat; micro-parties, by contrast, would have dropped from seven seats to just one.[1] According to electoral analyst Antony Green, the existing system "distorted electoral results," and the reform will benefit "parties competing for votes rather than those relying on preferences."[1]
The reform has generated conflicting assessments from minor party representatives.[1] Shooters, Fishers and Farmers MP Jeff Bourman contended that One Nation could become the upper house's largest party,[1] while One Nation Senator Rikkie-Lee Tyrrell acknowledged the reform might benefit her party but predicted no major impact.[1] Cannabis Legalise Party MP David Ettershank characterized the change as making the upper house "more conservative" and "locking in major party dominance."[1]