Earlier quoted context omitted.
Can you elaborate?
In some countries, pensions were nationalized, the money pooled, and everyone guaranteed a "fair pension" based on social criteria. It's a risk.
"everyone guaranteed a "fair pension" based on social criteria"
Let me translate it into humanspeak for you: this means existing retired, who paid low taxes, will get paid nice pensions out of your high taxes; and when you retire, you'll receive nothing and go begging, since the schema will go bankrupt.
Invest in real estate and skills that let you work for long.
And in USA most real estate is worthless in the long run.