I think your pension age idea is way too extreme. By the time people are 7 years before their cohort life expectancy, the majority would struggle to work. People just aren't healthy enough. Current age is too low and will need to move but jumping straight to mid-eighties would be horrible.
Completely agree with NI - there was a thread discussing that a few days ago. It's really wrong that low paid workers pay a higher marginal rate than well off pensioners.
For things like winter fuel allowance, free bus passes etc I think it should only be for the poorest people in society regardless of age. It's not right that millionaires get £300 they didn't ask for and don't need.
Housing - I think the market is fairly free but is slightly distorted due to tax treatment and some of these help to buy schemes. I'd support your idea. Ending the CGT exemption on main residences would be helpful in this regard. Then ending help to buy, right to buy (if it still exists) and any other government schemes of that sort.
Hopefully prices would drift downwards rather than plummet. This would help almost everyone.