I wonder considering the fact that your medical aid doesn't pay for a neuropsychologist, would they pay for a psychiatrist because they'd be able to prescribe better suited medication than anti-depressants?

Over the years I've gone through about five different doctors only for them to change me from one anti-depressant to the next. Eventually I was diagnosed with a mild form of epilepsy, and since then I've had a lot more progress.

I really hope that your wife comes to understand what this is actually all about.

If you get the chance, check out the thread under "How Can I help friends and family Understand?". Mark in Idaho suggests a link to videos on youtube which may be of some help. I could not believe how accurate it is!
Maybe it will at least get your wife thinking....