I don't know how old you are, but as you get older, the reality of this will inevitably sink in through either your own experience or from the experience of others around you - and that is that increasing the pension age will be incredibly cruel and unfair to some people, and this despite that may have been the best intentions and efforts of those people when they were younger.
The trouble is, there is no avoiding this, by 2050, the number of the population over 65 is expected to be 25% of the population. Double the current percentage. So that existing workforce will have to pay for it. I think about 600,000 currently receive the pension, that is expected to rise to over double. There just simply won't be enough taxpayers to fund it as it is at present. Imagine what the personal tax rates will be then.
The number of people aged 85 years and older will more than triple, from about 83,000 in 2016, to between 270,000 and 320,000 in the next 30 years. Those aged 65 years and older will roughly double, from about 700,000 now to between 1.3 and 1.5 million in 2046.