Hajo
I dont exactly know how it is in America, but I can tell you that in Aus it would be easier to get a lunch date with the Prime Minister than get anywhere with a criticism or an investigation of any of the Public Service bastadry. They are a Law unto themselves and any investigations that happen to get through the net are investigated....by themselves !!!!!
Here we have an "Office of the people's Ombudsman" and it is supposed to look after the people's interests when Government Departments (The Public Service...Hahaha) screw you around.
The last time I tried to contact them on some subject or other I got the following message on their phone answering system "Please note, that due to heavy demand for our services, we are not accepting any further queries for the next 3 months"
Of course, the Ombudsman is also part of the Public Service, so any time there are complaints, they just shut down like this and when questions are asked in Parliament about complaints against the Public Service, they say..."all is going well, we have received very few complaints in the last 3 months" !!!!!!