There’s an interview on The Rest is Politics Leading podcast with the politician Peter Malinauskas the premier of New South Wales who started the introduction of this law in his state first. I think it was maybe then taken up by the federal government.
https://podcasts.apple.com/gb/podcast/leading/id1665265193?i...
It’s very insightful and from listening to this it seems unlikely that murdoch was a huge influence on this.