are-the-duopoly-and-cathedral-identical

Political Industrial Complex claims that the duopoly captured media, but others would say the-cathedral is upstream of media (and public opinion) and essentially directs it.

Elsewhere, i’ve said the-state-must-control-public-opinion-through-media-and-university, which i believe to be true, but the question still remains:

What is the relationship between the-state, the-duopoly, the-cathedral, etc?
Much of whatever the “answer” ends up being is bound to be unscientific and bordering on conspiracy theory. Still, these terms should at least be properly internally defined such that they are logical and work together properly.