Hmmmmm.....
Imagine we have labour saving technologies coming online just as we reach the pinchpoint of this issue.
Oh well guess we don't.
Fundamentally the west refuses to engage with the reality of an aging populace with no replacements coming
You either accept massive immigration (unacceptable to median voter), raise taxes (unacceptable to the median voter), or cut entitlements (unacceptable to the median voter)