Yea and by the time I get to retirement age it will be pushed so far back that only a handful of people will live long enough to retire anyway. Just work until you die /s
But raising the retirement age is needed in an ageing population where people just live healthier and longer than ever.
Otherwise an ever increasing amount of people will be retired and the amount of people that can contribute to the economy and well everything really will decrease.
The same problem would arise if the amount of children suddenly started increasing rapidly, fortunately that would likely solve it self after a while since they would eventually work too. We need a balance of workers and non workers otherwise society would collapse.
The only way I can see that being sustainable is if we could automate to the degree that the amount of human workers could be less every year. But that's not possible yet (if ever).
And no I obviously don't want the retirement age to increase, I hope to also retire some day. But I see no choice.