>>ok_dad+he
Patrick Boyle did a segment recently on pensions that I cannot locate. He pointed out that the private industry in the US that granted generous pensions in the mid-20th century all went bankrupt, and that is why there are not private-sector US pensions anymore. It coincided with globalization, but is more a symptom of the countercyclical nature of pension expenses. They cost most when a business can bear the costs least.
This is one of many ways that folks aged 70+ had it much better than folks in the workforce now, and represents generational inequality that you should not minimize or attribute to "capitalists."
You may, if you like, attribute it to "generosity" by individuals indifferent to "math."