Retirement did not always mean you put on your slippers and did nothing from the day you stopped working until the day you died. There was once a very important sector of society who provided (often unpaid) childcare, worked in volunteering positions, helped out in their local communities and so on and so on. The idea that we need to have paid employment until we die is one that totally disregards the importance of that unpaid section of society.
Furthermore, although we are living longer, health problems connected to age are still prevalent. I am in my early sixties and, to be honest, I had totally accepted the fact that I would be working long past the time that I would be able to draw my old age pension. I did not mind. I love my work and I like the income. Then I was diagnosed with a progressive illness. It is an illness that creeps up on you and often manifests itself as you get older. Already, I tire easier and I cannot cope quite so well with stress. I have realised that in five years time, when I can draw my state pension, I will not be in a financial position to retire, yet I could very well be struggling to work.
So, yes, it is great to continue working for as long as you can, if this is something you want to do and you are still able to work. Yet, those people who can retire can still make a valuable contribution to society.
The nightmare scenario that I can see emerging is that there will be an increasing number of people who really should not be working either through age and/or failing health, who continue working because they cannot live on £185 (or less) a week.