I think the survey is also quite subjective.
In a boom / bust economy, things like stability, pension and benefits are either desirable, or not so much.
Sure, a 22 year old in the current job climate can afford to be a bit "picky", because there is a high demand for workers, even those with little or no skill. The economy will ebb and flow however, and some of those private sector employers may find that perks aren't easy to maintain, or offer quite as readily.
I think the CAF does a poor job of promoting the fact that an unskilled worker ( PTE-R), will not only be trained at no cost, but will also be paid and fed while that occurs. Pay rates have grown substantially in the recent past, and qualified candidates are certainly offered compensation that is competitive.
We're likely going to see a shift to candidates coming in the way they used to...from rural areas, and those who don't have the opportunities available to them either due to geography, or economic circumstance.