After all many VFR pilots just don't need an IFR rating along with all the expense of staying current etc.
I guess we have to ask ourselves how much is my life worth & the lives of my passengers? for the sake of a 'few' thousand dollars even if you don't get a rating just the extra training may keep you & pax safe should the !!!! hit the fan & things start looking a little pear shaped
We're never going to prevent all preventable accidents because humans are far to good at being stupid.
What I find gets most people thinking is the possibility that they through their own actions may have to live knowing they've killed someone they love. Generally I find humans are more conserned about loved ones than they are about themselves, so I think it's a good way to get pilots (esp ppl holders that don't fly to oftern) to think about having extra training even if they don't think their likely to use it more of a just in case.
Would be interesting to see CASA run a tactful campain on the issue, prehaps going as far as to mail out info directly to the higer risk pilots (ppl day vfr's?) They could really hammer home the point of training & recurrent training to keep pilots family and friends safe.