Physical jobs are an issue, I would not want to be a 65 year old bricklayer but I would argue that the majority of UK jobs are now office type.
I know that even factory jobs are largely sedentary, I'm working at a large Plasterboard Plant next week and most of the site operatives sit...
As a matter of interest, given the fact that we are all living longer how do you think any Government can finance the state scheme if we have a population that may be drawing a pension for 30 or more years? Please don't tell me you would get Google and Starbucks to pay their taxes...