I don't think the original intention of this thread was whether the SAAF did or did not do good/better/best training, but rather whether they are also going through the same pain that airlines are going through.
That is, losing pilots in droves.
The Air Force came up with the current system of contracts to force pilots to stay. The achieved their goal.
Also remember. An Air Force invest heavily in its people (note the generalisation). They sellect people on far different criteria than airlines. The profile is different.
They need officers that can lead people into, and out of, situations that civilians cower from. And they must be pilots as well.
Because you didn't make the SAAF selection doesn't make you an incapable pilot. You may have simply not fitted their profile or even been plain unlucky because they've found enough bodies to fill all the training courses.
Now back to the original post.
The SAAF pilots that want to leave may be a big percentage, numbers? I don't know.
The SAAF pilots than can leave are few. No hours, no type ratings, huge bond and even no license, are all problems.