Murdoch is a leaf on the river compared to technological change. Traditional journalism became endangered because the internet exposed a lot of what they do as vapid misinformation and opened up better options to do research. If I want to know about a politician's platform I can re-watch their debates and read their policies on demand. If I want to know about a subject, I can go straight to relevant technical reports. If I want to know about Cardinals being arrested for pedophilia then the newspapers are the only places that don't carry the news. Reading a newspaper article generally has negative value add, journalists usually don't capture the nuances.

But the bigger picture of authoritarianism is more to do with the technology needed to enable it. It is very cheap and efficient to run an authoritarian state with improved surveillance/computer vision and the ability to control people's purchasing with the electronic banking system.

We're already seeing early attempts at exercising this control in Australia with the cash ban bill this year. It'll ratchet up as time passes.