@Phil I'd love to see the methodology behind these "stats" that enrage you. Of course there are cases of Federal workers hitting porn sites. You'll find cases of any class of desktop workers hitting porn sites, unless employer surveillance is known to be very strict and punishment known to be severe.
You are succumbing to pure propaganda that reinforces your prejudices. I'm sure all those postal workers are masturbating to their phones while walking to your doorstep with your mail.