I don't really have a high opinion of the news (if you're calling it infotainment, I doubt you do either). It never really conveys what I'd call informative or important information. And the thing is, I, at least, am not interested in doing research into the political state of the world, what my true social conditions are, or whatever factors influence any kind of vast social power dynamic. There might be a lot of information about these things out there, but if I'm not interested in finding credible resources and developing a well justified opinion (or what I think is a well justified opinion), then the information will reside in a permanent blind spot.
So a society in which people never actively consider the consequences of their social status doesn't seem too far fetched to me. And if the infotainment doesn't just seem like blind entertainment, but makes one feel like they have a good grasp on the situation, then why would they actively seek out information that proves otherwise?
Now, I'm not saying that this is or would be true about everyone. There could be any number of reasons someone would actively seek to learn more about the true nature of society. I do, however, believe that whoever does learn more about their society would ultimately just belong to another social in-group. Intellectual debate and critical thinking live on, but just because there are groups who debate and think critically doesn't mean that these groups could ever actually affect social change.
I suppose it would generally go something like, "leave the philosophizing to the intellectuals and the policy-making to the politicians; but if you ask me, I could do it better than any of them." I mean just look at voter turn-out. Most people don't seem to care or have time for politics, but the political wheel keeps spinning, and I bet a whole lot a non-voters would still be willing to tell you "what's going on." Just look at me! I know that I know very little, but here I am, running my mouth.
If there is any kind of vast economic collapse, however, and the majority of people don't have any access to basic necessities (i.e. food, water, shelter, etc.), then that's a whole other situation. Maybe society would turn on ousting a scapegoat, maybe the rioting would be controlled and the wealthy would simply flee to safer waters. In that case, I have no idea how things could pan out or what would happen to any western culture.