Having a set pension age is basically stupid. I was a teacher and at the age of 60 I had had enough of the target setting management that put statistics before childrens educational needs. I did some supply and similar for a couple of years which was great (until they decided that my wage of about 30% of a teachers was too much. However I think I added experience to the childrens experience, I was happy to do this for a reduced wage (my teacher pension had kicked in).
I am sure that in many jobs a scale down to part time would benefit both individuals and organisations. Some jobs are very physical and it is impractical to continue – but the experience can still be passed on. So abolish the retrement age cut off and allow tax benefits for those who are willng to still contribute! An active elderly population would benefit the economy and NHS massively.