What you are suggesting (in your fact vacuum) is that the 20 somethings all have separate homes and means of support and they can just pick up the slack for the older, more experienced folks. Neither of those things are true for the most part.
You are essentially proposing rewiring the entire economy which would cause even more turmoil than what’s happening now. Or do you propose some central planning?
And for many of the really older types who don’t live with younger family, being separate in a special home isn’t working out so well.
While it’s not killing the 40-60yr olds at the rate it does the ‘elderly’, it’s whupping their a@@es. Bigtime hospitalization rates for that age demographic.
Those are the business owners, managers, shop floor supervisors, etc.
Can’t run a business without them for very long.