The Lib Dems have brought out a report in the last few days.
One of their suggestions is that those working past retirement age continue to pay NI. I would go further and say that all retired people should continue to pay NI, except those whose income level is at Pension Credit level or just above.
In fact, ideally, I would get rid of all the bells and whistles, older people get, including free prescriptions. If you need a lot of medications, a prescription prepayment certificate cost £104 a year, £2 a week, to cover all prescriptions for a year. and increase the Pension Credit level to ensure those on the lowest incomes are not out of pocket. Paying NI and for prescriptions should bring in significant extra money for the NHS and older people could no longer be described as a 'burden' on the NHS as we would still be contributing to the system.