A powerful new report, The Missing Million, has just been published by PRIME, the Prince's Initiative for Mature Enterprise.  It makes the case for enabling far more older people to stay in work.  Many elements of the case are quite familiar:  the challenge  to us all of an ageing population; the need for individuals to assure themselves of a decent income in old age;  the intrinsic value of work, e.g. in the social contacts it brings;  and so on.  But there is a wealth of factual analysis and insights to back it up, some of them quite surprising (to me at least).  Apparently people in the UK on average believe that…