Most companies don't offer pensions anymore. Some companies don't even offer 401ks at all, and a significant portion of the ones that do don't do any employer contribution matching.
We’re not all in a race to the bottom.
What they moved away from was private pensions owned by your company. Now you own your private pension through the 401k thing they keep talking about. This IS a better and more sustainable system, but at the same time this was rolled out most companies also cut company-pensions but didn't give you more compensation that you can put on your 401k.
European companies are not forced to pay into your private pension either, it is usually part of union negotiations. Check how much basic pension pays out in Sweden (the almighty socialist country), last I checked it is ~900 euro per month. My parents in law make that much per month in retirement because they never put any money towards a private pension and never held a unionized job.
The main component is usually something similar to US Social Security, except that contribution rates are higher (16% in Sweden). Benefit rate (at any given retirement age) is usually close to a linear function of total contributions, adjusted for inflation. Most people expect to get most of their retirement income from that component.
Then there are supplementary components, such as voluntary or union negotiated private pensions. Some of them are a bit weird, such as the Swedish defined contribution plan with a mandatory 2.5% contribution.
Sucks for the elderly, but it prevents the catastrophe that is France and that the US is heading into.
It seems good enough for median earners. After taxes and health insurance, it's basically even.
Perhaps not self-sustainable you mean that unless something changes, it's not going to be able to keep paying out at current rates.
Well, I got news for you - that's what is happening for almost all government-run pension programs across the world on this model. Pay as you go does't work when you keep the same payment, and have 10x a higher ratio of recipients to payees.
This isn't unique to Social Security or the US. It's just a mathematical fact of the system.
You cannot have 99% of people contribute `x` and 1% of people receive `y`, and then switch that to 70% contribute and 30% receive, without either increasing `x` or reducing `y`.
You could have planned ahead for this long ago, and seen that the ratio was going to change and increased `x` over time accordingly or planned to reduce `y` over time accordingly. But we didn't, and mostly no one else has either.
*Asterisk because EU is big and diverse, and I don't know every country rules.