Question

What is pension's problem?

Answer 1

The pensions crisis is a predicted difficulty in paying for corporate, state, and federal pensions in the United States and Europe, due to a difference between pension obligations and the resources set aside to fund them. Shifting demographics are causing a lower ratio of workers per retiree; contributing factors include retirees living longer (increasing the relative number of retirees), and lower birth rates (decreasing the relative number of workers, especially relative to the Post-WW2 Baby Boom). There is significant debate regarding the magnitude and importance of the problem, as well as the solutions.
Reference:
https://en.wikipedia.org/wiki/Pensions_crisis