People tend to want their worldview confirmed. If you want people to be better informed, one way would be to make them angry when they encounter things designed to manipulate them.
I think that other than marginal gains, this is a pipedream. The reason the news media is the way it is is due to the choices of the people consuming it. A change in the industry itself is unlikely to put a dent into this, because people will just go elsewhere to get the 'news' they want to hear.
We would need some kind of a fundamental change in society. Maybe if we completely revamped the style of childhood education, it would be possible to change what people look for in the news. I think that practically such a fundamental change is next to impossible. People talk a lot about how we need changes to the education system, but they're usually either spewing hot air or only want small changes.
If that was already true, there never would have been an Enquirer or Weekly World News.
Ultimately, I'm not looking to blame the supply side, either: certainly there's some blame for the demand side too. In fact, I don't believe blame is a productive thing to do in this situation or most situations. But I am trying to change it from the supply side, because when you try to create change from the demand side, you run into more issues with affecting free choice which makes this and many other problems more intractable.
I also think you're wrong about why the Enquirer et al exist: some people take these as just humor and get their information elsewhere, and others want to be informed, but due to bugs in the human brain, think that sources like the Enquirer are good sources of information. Neither of these are "people not wanting to be informed".
By bettering basic education. People could learn the relationships and interdependecies of the system and society itself, including the role of information. Why not learn everything through RPGs?
This would create a demand for better news sources in the long term.
Because education increases environmental awareness, and informative news provides it. So you'd want informative news to remain environmentally aware.
Each time I encounter this, I am stunned. But it still happens.
Clearly the person you're responding to wants a system that makes people better informed, and I think there's a lot of other people (myself included) who want the same thing. So the question is obviously, how do we change the news ecosystem from what it is, to a system that makes people better informed?