I agree with Brian that "We must expect to save ourselves for old age". There is nothing to be gained from dying beforehand. However, having gone through the act of survival to arrive at old age, receiving a pension which provides the basics would seem appropriate if not obvious. I think the "basics" might be covered by, let's say, a pension at 50% of final salary and indexed linked to RPI so that we might save ourselves in old age - and in particular from reckless bankers.
I agree with Brian, too, that for people who want to do so AVCs are an excellent way of saving an additional amount over the state and occupational pension contributions.