Agree completely
Especially when retraining is not guaranteed to get you the higher-level positions in the first place. Am I supposed to believe that a plumber having successfully studied to become a surgeon is going to find a wealth of positions offered to him ?
Exaggerated example, for sure, but I doubt very much that retrained ex-low-skilled workers are going to have a chance at getting jobs that younger, fresh-from-Uni candidates are being refused for lack of experience.