Don't confuse what is the current outcome with what has to be the outcome. Those individuals might not reskill in todays environment because of a combination of receiving an insufficient amount of the value they produced in their wages (preventing them from having the resources to retrain themselves), as well as social programs for reskilling being severely limited in both funding and how they constrain how and what skills are trained. (preventing gov't resources from retraining workers).
Neither of those has to be a forgone conclusion.