In the UK, there is the basic state pension. The pension age depends on when you're born. For young people now, it's 68.

However, the state pension pay is so low that almost everyone gets a commercial pension. Usually, it's a salary deduction and employer match contribution scheme, so you can choose how much to save. At the moment, you can start drawing your commercial pension at age 57 (increased from 55).

See https://www.gov.uk/government/publications/increasing-normal...

It's different in every country. In Denmark it is a mix: everyone receives a state pension (the Nordic model of universal welfare), but almost everyone also has a private pension account that they out money into.

Also curious… in the US I don’t know any working professionals in my generation (millennial) that are counting on social security as part of their retirement planning. If it’s there, great - but if it’s not, not going to let it keep me from clocking out at 65.