well of course its not black and white.....its all connected.
however, Japan and Korea have different gov't styles and economic ways of life
The USA, 'we' can plan for it, and work the plan (AI is coming, we cut down on handouts, the gov't can incentivize certain higher ed programs based on need....vs. blanket loans for anyone/any degree, enact new savings plans vs just the 401k, expand Roths, slowly shrink the military....tons of ways)
or
take the unsustainable easy way out and just import bodies to grow the economic base and kick the can to the next generations....where resources, land, housing, and open space gets more and more rare until it breaks...
we have taken the easy way out