Class action lawsuits! Yes, agencies can be sued but so can individuals. It might be difficult to find out who was manning that aircraft but it's not impossible.

If, and when, the corruption is dealt with individuals who participated in any small way should live in fear of having all of their worldly possessions taken from them. They knowingly made a conscious decision to negatively affect the lives of their fellow Americans. It might take years if not decades but they should not be let off easy because they were "just doing their job". Scum of the Earth.