Are 'care credits' a good idea?
The system already operates in Japan and the government is now considering whether it could also work in the UK.
Care Services Minister Paul Burstow said it could help vulnerable people maintain their independence.
Charities said they welcomed moves to get more people volunteering, but care in old age was a right not a reward.
Are you a volunteer? Would you do more volunteering if you could redeem the time back in later life? Is this a good way to approach the care of the elderly or disabled? Does Cameron's idea of the Big Society appeal to you?
This debate is now closed. Thank you for your comments.