They are also given certain additional rights under parliamentary standing orders, such as extended time limits for speeches.

Before the 1890s when there was no formal party system in South Australia, MPs tended to have historical liberal or conservative beliefs.

The rise of Labor saw non-Labor politics start to merge into various party incarnations.

Labor formed South Australia's first majority government after winning the 1910 state election, triggering the merger.

In comparison, every former Labor opposition leader for over half a century would also proceed to serve as Premier.