All societies, at some point in the past, may have started at similar level of privacy ...etc. Due to various reasons, if we see now, some societies are more open than the rest and this is due to the choices they made consciously or accidentally or made by influencing entities in those societies. Wikileaks is following the same trend but may be with more speed/velocity.

If we see history, there are no absolute boundaries of privacy and it changes with time and it may feel outrageous now but if we see multiple similar incidents, then it becomes natural,common and after few years, it becomes standard of life and I won't be surprised if future generations in these societies feel proud of that level of transparency and make fun of those who lack that level of openness.