alt Hacker NewsThere is no system where you can get more than a share of what the economy produces currently.
Paid contributions should only ensure that you get a part of that, a bit more if you paid more, less if you paid less.
If workforce/economy halves when pensioners double, you will get 4x less than you "expect".
The argument is ultimately constitutional. If pensions based on past contribitions are private property, the government can't avoid paying them when it's no longer economically sustainable. The obligation remains even if the government is no longer capable of honoring it. Political choices and ordinary laws can't change that. The only way out is amending the constitution and socializing the private property.