They're the soon-to-be pensioners. So a group that will be heavily affected by any changes for the worse with pensions. (Although obviously any erosion of pension rights will affect younger groups too. Because once it's accepted, it's easier to get people to accept further erosion. In France young people realise this, which is why so many young French protested against Macron's pension age increase).
Some of the 60-64 age group, maybe many, are working. But although everyone ages differently it's a stage of life when it's not uncommon for health issues to occur. Which may impact their ability to work or to work full-time.
Also employer age discrimination against over 50s is a well known issue.
So things definitely aren't good for the 4.6 million over 50s still to pay off their mortgage, and the 2 million over 50s private renting.
Studies found that poorer older people have usually been in poverty for years. So they've never 'had it good'. Others experienced Shit Happens change in circumstances. Like bereavement, illness, domestic violence, divorce, redundancy, caring for a disabled child.
Generalisations ignore the less fortunate. Which is a big reason why there's increasing pensioner poverty. They're too often a hidden and ignored group, so not enough is done for them. That needs to change.