Once I had a manager who paid so little attention to me for a long time that I considered to stay home for a couple of weeks. I think he might not have noticed. Maybe my co-workers would have. I wasn't brave enough to test it out for real...
At my current work, official retirement age is 67 and early retirement is 62. From that age you can claim it.
I have a category of indirect colleagues who have to do very concentrating work. At 60 they are considered too old for this work. A few of them can become trainers and managers, but the rest of the 60 year olds are sent home and get paid to not work until they are 62 and can take out their own pension. Seems like a good deal to me.