This sounds incredibly cynical to me. It seems desirable to me that a newspaper has some authorial cohesion. That the audience of readers has some identifying viewpoint and person that they can comprehend. So editorial guidance in that sense seems positive.
I guess I can imagine how such a editorial process could create a monoculture (although I don't think it has to), but that's where multiple newspapers become useful. While one newspaper may have some editorial angle, different newspapers have different editorial staff.
Journalists also seem to me to be rather principled people. If their editors were systematically suppressing certain stories and angles, I'd expect them to start a new newspaper, especially considering how easy it is to get started nowadays, and report on that.
With all these considerations I don't see what system would keep these stories back. Editorial staff can maybe control a single newspaper, but they can't control the other media. Even if they could, they wouldn't be able to control journalists that may become disillusioned by such a system.
I guess I can imagine how such a editorial process could create a monoculture (although I don't think it has to), but that's where multiple newspapers become useful. While one newspaper may have some editorial angle, different newspapers have different editorial staff.
Journalists also seem to me to be rather principled people. If their editors were systematically suppressing certain stories and angles, I'd expect them to start a new newspaper, especially considering how easy it is to get started nowadays, and report on that.
With all these considerations I don't see what system would keep these stories back. Editorial staff can maybe control a single newspaper, but they can't control the other media. Even if they could, they wouldn't be able to control journalists that may become disillusioned by such a system.