I think you just need to find a way to align incentives. Capitalism can work just fine. The reason we're in this situation in part is because the skills and resources you garner for delivering journalism happen to overlap with those needed to deliver political tabloids. We don't worry about air conditioner manufacturers magically becoming insurance companies, because its hard to do so. So ultimately if you align incentives enough I think you can make it increasingly unlikely a specific 'truth seeking' organization will slide into tabloids. But I don't know the formula. It might boil down to re-baking the culture which awards good journalism and bootstraps itself off of valid credentialism.