naturalman1975,
Are there not laws in Australia with which to charge any woman who makes unsubstantiated rape charges?
If so, why was this woman not prosecuted?
From the article, it looks like she's not mentally competent, and hasn't been for a long time. A better question is why nobody in a responsible position realized it.
She’s almost certainly committed perjury, but it seems to have been decided that charging her might prevent genuine cases from being reported. Personally I think that can be addressed by charging her, and making it very clear why in her case it’s justified - this isn’t a woman who made an accusation that could not be proven because of a lack of evidence - this is a woman who a judge said explicitly that she was unreliable and untruthful.