Seniors as volunteers and their training.

Supposedly, seniors have a good deal of discretionary time at their disposal, but so far, they form a much smaller proportion of the volunteer force than their numbers in the total population might lead us to expect. Yet they undoubtedly have much that they could contribute in terms, for example, of experience and accumulated skills. What might their contribution be, in fact? What do those who do volunteer contribute now? What training, if any, do they require and what do they actually receive? Do organizers underestimate their capacities and the contribution they might be persuaded to make?