The Liberals, the senate, and preferences

The Albanese Labor government has little difficulty passing its legislation. Since its election in 2022 it has had a significant majority in the House of Representatives and, although lacking a majority in the Senate, has nearly always enjoyed the support of the Greens and some left-wing crossbenchers.

The Liberal/Nationals Coalition is powerless to block legislation unless it can enlist the support of the Greens and some crossbenchers. For obvious reasons, that is rare.

Even if the Coalition had won the 2022 and 2025 elections, it would still have had a problem in the Senate. The combined votes of Labor, the Greens and left-wing crossbenchers would have ensured that nothing controversial was passed.

This is not a new problem for the Coalition. In 2013, when Tony Abbott led his party to victory, the Senate proved his undoing. While he succeeded in repealing the carbon tax and passing legislation to deal with illegal immigrants, most of his economic policies were blocked in the Senate. That led to the perception that his government was failing, causing a decline in public support and his replacement in 2016 with Malcolm Turnbull.

Turnbull thought he could fix the Senate problem by changing the method of electing it. Rather than political parties negotiating to exchange preferences, in a system known as group voting tickets, preferences would be made optional and left entirely to voters.

Turnbull and his ministers, with Mathias Cormann the leader in the Senate, convinced themselves that under the new method the Coalition would gain sufficient numbers in the Senate to pass its legislation whenever it won government.

Historically, changes to the electoral system have had the support of both sides of politics. Not this time; Labor vociferously opposed the proposed changes (as did several crossbench senators, including me and Bob Day). As a result, the Coalition negotiated a deal with the Greens. The combined vote of the Coalition and the Greens ensured the changes became law and the 2016 double dissolution election was called soon after.

Labor opposed the changes because it foresaw a future in which it would be forever reliant on the Greens, with little prospect of achieving a majority in its own right. While the policies of the two parties overlap quite a lot, they compete strongly for the left vote.

The Greens supported the changes because they realised it would stop most minor parties from winning seats, and relished the prospect of having the balance of power with two Senate seats from each state.

As the 2016 and each subsequent election showed, Labor and the Greens were correct; Turnbull and the Liberals were wrong. Although the Coalition won the 2016 election (with a much reduced majority), its position in the Senate was not improved and it struggled to pass its legislation right up to 2022.

There are competing arguments as to whether democracy was enhanced by the new voting system. While the group voting ticket system could be criticised for allowing political parties to exchange preferences in ways that disregarded the wishes of their supporters, it allowed minor parties to work together to win seats. It also only required voters to vote 1 above the line.

On the other hand, optional preferential voting in the Senate is confusing when there is compulsory preferential voting in the House of Representatives.