It's a core question to public choice theory, and why people are generally very unhappy with politics in general. You end up with aggregations of baskets of goods that aren't just suboptimal for you, but suboptimal for the bast majority of consumers, but where there's no practical opportunity to offer the alternative. The barrier to even begin to compete is so high, so the agents (the owner of the newspaper, the retailer, or the politician) end up twisting the available options in their favor.

This kind of knots get solved automatically in markets that are very easy to enter, or by regulation. That's why for the commercial examples, we can have consumer protection laws that create little distortion and have a better equilibrium. Good luck trying to use that lever to fix politics though.