Pension plans depend on populations being stable and not living longer and longer. Most of Europe have a rate below 2.0 (replacement rate) and people are living longer and longer.
So either you increase the retirement age significantly or you have to expand the base.
In which case you have to do that indefinitely and it's a pyramid scheme.
Also most non eu migration doesn't end up being a net positive for those govs within the first generation (or even second depending). Far from actually and these migrants are not immune to aging then they end up requiring pensions too.
And all of this to serve dying generations when those younger than me starting out get ever increasingly shafted.
Here in Belgium pension plans existed that did not work like that.
Then the socialist raided these funds and the future generations were going to pay for those pensions. My family's criticism was that they could only do that once and they were right.
I don't tie this issue to socialists tho. 2 decades ago the liberals(european, right wing) did the same to the railways who had a separate pension fund and more recently yet another party suggested doing the same for a 3rd pillar of selfemployed people.
