Actually, as a "policymaker" and member of the US Intelligence Community, all academics need to do is think, interpret, and write. It is little known or recognized, but policymakers do read musings and incorporate them into practice. Many times a year, intel agencies hold conferences inviting scholars from all over to present. Often the direction of study and focus are solely shaped by the academy. One intel agency, for example, has recently established an entire division devoted to incorporating social constructivist methodology into US strategic thinking. It is quite awesome. Additionally, this division looks at how realist thought influenced decisions during the Cold War and how we can alter direction post Cold War.
But, I hate working in the community so that's why I am going to become a professor. :-)