Pension funds collapsing. Social Security becoming insolvent. Shortages of places in retirement homes. Spiralling health care costs. Wealth being tied up. Delayed inheritance.
Defined benefit pension funds are in deficit, and so the industry is turning to defined contributions instead.
All in all, it isn't a great deal of social upheaval, really, and can be addressed by sensible changes in policies. Unfortunately not much is getting done, partly because of this Brexit problem.