You're equating the average politician being informed on the issues and having a significant level of intelligence.
For the most part, history has given us countless examples of just the opposite. I only need to point to the current leadership in my own country, Canada.
In all seriousness, I doubt if high level politicians use GOS. They are probably given phones from their respective security agencies instead of an off the shelf device from the local cell phone shop. I would not be surprised though if well known journalists or celebrities use GOS.