I think he makes some valid points. A flat retirement age at 65/67 is no longer practical and has always been unfair.
When pensions were introduced, the average manual worker died around pension age, possibly before. Now they live to get some return. Meanwhile office workers tend to be richer and live longer, with a longer retirement. The people who benefit the most are the richer members of society. You can't expect a miner to be working after 65, while there are many jobs where people can easily work into their 70s. Fitter, healthier people can work longer and still enjoy a longer retirement.
We do need incentives so people who can are encouraged to work longer. A one-size fits all approach cannot work. A shift from full-time to part-time work is a more sensible solution than the all or nothing system we have now. If this flexibility became common, people who could afford to might choose to wind down their working hours much earlier, opening up opportunities for younger people.
However, its would be interesting to know more about Lord Wotsits situation. I assume that while working in the Lords and sitting on various quangos he is forgoing his pension benefits

-"). According to his proposal this would be expected. If he is receiving his full pension and claiming Lords expenses I suggest a form of culling to reduce the public expenditure.