Can't speak for those countries in particular, but generally you can work past retirement age, or retire earlier if you have funded/planned for that. A retirement age is usually just the point at which you can receive government assistance as part of a safety net. I assume if it's not pegged to life expectancy, the cost to the public grows.

Here in Australia, and I imagine elsewhere, there are strong systems (e.g., superannuation) to encourage personal savings towards retirement.