Earlier quoted context omitted.
If we could just stop being economically gaslighted it would help. The economic system can't be simultaneously unproductive enough to require us to keep raising the retirement age and so productive that job loss is a big problem. It is possible that a political war on labor is being waged at both ends.
The changing demographics is what causes the retirement age to be increased. In the 1960's, the average lifespan was in the 60s. So a retirement age of 65 meant that around half of retirees would die before collecting retirement. Now the average lifespan is 80. And the median age of the population is older than ever. Not really much to do with an "unproductive" population. Except that retirees are unproductive I gues…
If we pretended that there had been 0% increase in economic productivity since then then, then yes, changing demographics are a problem.
This is indeed, what most justifications of increasing the retirement age quietly assume. It's probably quite easy to assume because the % of increase in productivity captured by the working class since 1970s as wealth has actually been quite small.
Compounded economic growth since the 1960s has, I think, been something of the order of 200% though.