Really? It's more than just "image"....
http://www.washingtonpost.com/local/....html?hpid=z10
“I believe it’s more a function of the fact that 1) the standards of conduct are both clearer and more stringent at TSA than at many other federal agencies, 2) TSA workers are more in the public eye than many other federal employees and 3) TSA has a more streamlined disciplinary process than most agencies,” John Palguta said by e-mail. “So when there are problems they are more easily identified and more quickly dealt with.” He is a Partnership for Public Service vice president who previously worked for the Merit Systems Protection Board and the Office of Personnel Management.
So, it's simply a matter of "the standards are higher for us, so it looks like we're bad" ???