The last few decades with significant numbers of people able to retire came courtesy of pensions and generously increasing social security benefits. No significant fraction of the population has ever retired on savings and investments anywhere in the world. It is dangled as a theoretical possibility if everything goes right.
As people with pensions and generous social security benefits gradually die off so will "retirement".
Having enough to live on without working will return to it's former label:
"being rich".
Yes you are correct-A comfortable retirement may be more for the rich in coming decades. All you can do to be proactive is to put away what you can afford from your surplus income, and you may have a chance at a reasonably comfortable retirement. If you expect your government or employers to do it for you! well think again!