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The '''Australian electoral system''' is a system of parliamentary democracy, largely based on the [[W:Westminster system |Westminster system]]. Since 1920, [[Australia]] has used [[Preferential voting | preferential voting systems]] (PV):
* [[Single-member district | Single-winner]] [[Instant-runoff voting | Instant Run-off voting]] (IRV) in the House
* [[Multi-member system | Multi-winner]] [[Single transferable vote | Single Transferable vote]] (STV) in the Senate
In Australia, voting is compulsory for all Australian citizens over 18, except prisoners currently serving a 5-year term or more. It is also compulsory to be on the electoral roll.
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== Australian states and territories ==
All 6 Australian states and territories have compulsory voting and preferential voting, the ACT and Tasmania however use a proportional representation method of PV for the lower house called Hare-Clark. All states use PR-STV for their upper houses (senate equivalent) except Tasmania
== Preferential voting in Australia ==▼
== Major party duopoly ==▼
[[File:Australia house vs senate support vs seats separated lines.png|thumb|Party support vs actual representation in Australian Senate vs House]]
In 2022, there was a marked move in first preferences away from the two major parties and towards minor parties and independents.
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▲== Major party duopoly ==
=== Theories for the continuation of the major party duopoly ===
Some argue that the reason that the major party duopoly is still apparent in Australia is because strategic voting still widely occurs in the PV system, that is that people frequently have to sacrifice their true preference in order to pick 'the lesser of two evils'.
Another theory for the reasons why the duopoly exists is because the minor parties provide a moderating effect on the extremes of the major parties. For instance the Australian Labor Party (ALP) wouldn't be so environmentally friendly if it weren't for the threat of voters deserting for the Australian Greens (Greens) and its policies on the mandatory detention of refugees would probably be stronger as well.
On the other side of politics a Liberal party candidate for the seat of Ipswich near Brisbane, Pauline Hanson caused a stir by her widely perceived as racist comments about Aborigines and Asian immigration. As a consequence she was disowned by her party and went on to found Australia's most successful minor party One Nation. However One Nation failed to do well partly because of constitutional failings in the party, but mostly because the John Winston Howard lead Liberal/National coalition appropriated some of her racist, inhumane and divisive policies and successfully implemented them in time to win the 2001 election.
Both the Centre squeeze effect and the moderating effect of viable more extreme parties cause a polarization in the centre and an underserving of moderates.
The reasons why minor parties are underrepresented in the Australian HoR are:▼
Another major reason that Australia has a two-party system is that the House is elected by electoral division (also called seats, electorates, or constituencies). To win an electoral division, a candidate must gather 50% of the preferences of the voters in that electorate, after [[IRV|redistribution of preferences from eliminated candidates]]. This leads to minority parties not winning seats, as, although there may be a large total number of first-preference voters for the minority party, they are distributed among the divisions, and do not gain a majority of preferences in any particular seat.
The system of electoral division means that a party can win a majority of seats without enjoying a majority of voter support, if the "majority party by voters" voters are many in number in a few electorates, and few in number in the majority of electorates. Moreover, losing ballots in each electorate have no affect on the composition of the House of Representatives. When done purposely, this phenomenon is known as [[Gerrymandering]]. Thankfully Australia sees little true Gerrymandering, as division boundaries are directed by the independent Australian Electoral Commission.<ref>{{Cite web|url=https://www.aph.gov.au/About_Parliament/House_of_Representatives/Powers_practice_and_procedure/Practice7/HTML/Chapter3/Electoral_divisions|title=Electoral divisions|website=Parliament of Australia|url-status=live}}</ref> To remedy this issue, an electoral system that guarantees a measure of [[Proportional Representation|proportional representation]] has to be used.
▲
Although in theory it is compulsory to vote in Australia and 95% of Australians do, it is not a strictly enforceable law. All that is really required by law is that the voter show up to a polling place between 7am and 6pm on polling day (always a Saturday) and have their name ticked of the electoral roll. Once in the polling booth, due to the secret ballot, what you do is up to you, that is whether you choose to register a formal or an informal (spoilt) ballot paper. A fine for failing do so will set you back $50, unless you have a 'valid and reasonable excuse' as defined by the Australian Electoral Commission (AEC), what actually constitutes a valid excuse is of course a safely guarded secret.▼
# Many voters choose to vote above the line instead of ranking candidates. This allowance is made to to the high cognitive load of ranking. This reduces the system to Party List.
# The method of [[Parliamentary government formation]] is party based which causes further partisanship and polarization.
▲Although in theory it is compulsory to vote in Australia and 95% of Australians do, it is not a strictly enforceable law. All that is really required by law is that the voter show up to a polling place between 7am and 6pm on polling day (always a Saturday) and have their name ticked of the electoral roll. Once in the polling booth, due to the secret ballot, what you do is up to you, that is whether you choose to register a "formal ballot" or an "informal
=== Advantages of compulsory voting in Australia ===
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=== Disadvantages of compulsory voting ===
The small fee for non-compliance doesn't deter many voters.
== External links ==
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[[Category:Forms of government]]
[[Category:Australia]]
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