Because I directly witnessed defamation by team leader, HR and the EL 1. Not once, not twice...
I also witnessed verbal abuse by a male employee to several other employees. Not once was that man formally reprimanded and to my knowledge he is still abusing.
I heard team leaders slanderising the physical appearance of more attractive females as being... Well, you guess what jealous females say that would be inappropriate language here...
I saw an employee resign the same day that an EL 1 dragged her into a room and verbally abused her over a personal matter, completely unrelated to her wonderful work ethic. She knew there was no point going to HR because once one of these people decide you are their next target they will attempt again, and again, and again, and again to "performance" manage you out. Everyone eventually leaves, regardless of how good they are at their job, because they just have no energy left...
I left because I'd saved enough money and secured enough outside work to not have to out up with them and waste my energy when they decided to turn their malicious, insecure and pathetic gazes on me rather than find some real meaning in their lives.
Team leader pressured me to take a redundancy in June 2014.
Reited in 2005 left after forced sick leave of two years at the APS 6.5 level
Insider politics and nepotism
Wanted a change.
Was on contract and it ended unfortunately.
I took a voluntary redundancy as I moved to a remote area of Australia.