They're clearly trying to dial back the pension principles to how they were when it began, in that it was deliberately planned for an age over the average age when people (probably men, at the time) would have died.
Kind of making it like an extra reward for having the good fortune of not being disabled, not becoming seriously ill, not growing up or living in deprivation circumstances that are well-known to shorten your life expectancy and also not having to do a manual job. See also: school attendance awards.
Effectively, it's privileged wealthy, healthy, able-bodied people deciding that they're such jolly good sorts, they should be given a big thankyou stipend from society for being absolute top bananas.
When you're in the position that I (and countless others) are in, with disability, serious health conditions and other adverse circumstances, it paradoxically becomes both more of a gross insult and less to have to bother caring about anyway, the more they wang on about pension ages going up - usually alongside talk of how 'we're ALL living so much longer now' - as it's already well over the age that we are going to reach in the first place, so it's all academic.
If they brought in a ruling that people blessed with amazing health would have to work until they were 85 or 90 before getting a pension, there would be (not unjustified) outrage; but that's effectively the deliberate active choice they've set in stone for millions of us who are in a much less advantageous position. However, to be fair, they're still letting us pay our taxes towards the pensions that other people will eventually receive....