About the shortage of aviation workers for the future,my opinion is that ther's gonne be some work...but in what conditions?...
if you read an AMM,you can see that even a monkey can follow the procedure without understanding what he does. Even the part 147 training are like that. just describing,not explaining the system.
we can forecast aircraft maintenance with only a few engineers with type rating stamps,managing some big teams of "nut tighteners" with a low pay.
There's no more big trouble on aircraft nowadays...I remember,even only 15 years ago,flying to NYC or BKK with a bunch of guys for an engine R/I...on B747...
Only the experience allows to gain time in line maintenance;because you know that this or this fault message is a spurious one...or wich system to reset to erase this other one...