There was a piece on PBS Newshour recently about older workers (largely skilled blue collar) staying on longer with verious incentive because employers couldn't find skilled replacements.

What stuck me as ridiculous was some owner who said something about having invested 30 years in these guys. He hadn't invested shit as far as I could see. He has a handfull of employees that had invested in their own skills. If he had invested in his employees he have a new generation ready or almost ready to step up as one retired.