Why does Queensland have only one house in its state parliament?

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Queensland is unique among Australian states for having a unicameral legislature, meaning it operates with only one house of parliament, the Legislative Assembly.1

The state previously utilized a bicameral system that included an upper house known as the Legislative Council. However, in 1922, the Legislative Council voted itself out of existence at the instigation of the ruling Labor government. Since that time, the Legislative Assembly has functioned as the sole chamber of the Queensland Parliament.12