Whistleblowers will continue to leak state secrets, warns AP chief

I wonder how agencies can limit the amount of leaks, when their human employees with "secret knowledge" have moral conflict concerning their work and feel that they have nothing to lose. Is it too far away to even think about possibilities like extorting employees with things that could happen to their family members for example? North Korea comes to my mind as an extreme example - "escape and all your relatives are sent to torture camps". What are the preceding steps?

Pretty much what he said. If you want to keep stuff secret, a very good way to do that is to not give "top secret" access to 1 million people, and "classified" access to 5 million people.

Of course the only reason that has happened, is because the past 2 administrations have been a sick joke, and they only label it classified simply because they don't want people to find out about it, not because it's a real "threat to national security" if people were to read most of those documents.