Let's censor the truly destructive
They could, of course, realise that the paternalistic viewpoint inherent in censorship is destructive and outdated. Based on religion and dogma of their 'morals', their views are rejected by most people now. So maybe the best starting point for debate is to remove all censorship from the table and only add back what can be justified objectively.
It's easier to make a case for providing information - but the threat there is less to do with showing a nipple, and more to do with explicitly making it known that information you might be provided with contains lies. Rather than age related limits, what we really need is recognition that the biggest threat to society comes from lies told as fact.
Therefore politicians and murdoch would need to carry classifications of "MB" - Much Bullshit - Warning, this programme contains lies, deceit and should not be taken seriously.
And maybe we should couple that not with an age related censorship paradigm, but and IQ based one. If you are too dumb to sift bullshit from fact, you don't get exposed to the lies because you are not intellectually mature enough.
That would truly help society.