The six-year legal saga came to an end in 2014 when the High Court decided the public servant was not entitled to compensation for physical and psychological injuries she sustained when a light fitting was pulled from a wall while she had sex in a Nowra motel room in 2007.

Senator Abetz revealed last week that the case, known as PVYW to protect the woman's identity, had cost taxpayers more than $600,000 in legal fees and highlighted the flaws in the system.

But in an opinion piece for The Canberra Times, Mr Grey accused the minister of grossly misrepresenting the case to win support for his changes to Comcare.

"I have never responded publicly up until now to the criticisms and ridicule heaped upon the case in which I represented Ms PVYW," Mr Grey said.

"However, the misuse of the case by a minister of the Crown for political purposes not only offends me greatly as a lawyer, but is grossly unfair to my former client, who ran her case on the advice given to her and is not in a position to defend herself, and insulting to the six judges who thought the argument put by us was correct."