It’s worth noting that Australian and American interpretations of liberalism differ quite significantly. The modern Liberal party and its predecessors formed in direct opposition to the Labor party, in direct opposition to the labor movement. They formed as a party against radical social change, against socialism, and for free-market policies and laissez faire capitalism, describing themselves as “classical liberals”. On the other hand, “liberalism” in the US more refers to social liberalism, but it’s actually the exception in that regard.

All that is to say that, when Australians refer to someone as a liberal, we mean a different interpretation of the word closer to classical liberalism.