It seems like once a month we get a report about the TSA or Homeland Security falling down on the job. Is there a school for TSA or DHS? Can it be overhauled?

It seems like once a month we get a report about the TSA or Homeland Security falling down on the job. Is there a school for TSA or DHS? Can it be overhauled? It seems like an external government agency needs to be brought in to evaluate pretty much every agent they have on payroll and classify them into "OK", "Retrain", and "Dismiss" groups. The problem is their might be too many in the "Dismiss" group for it to work without sacrificing screening capacity and efficacy.