But the rules have to change because the demographics changed. The number of old people is increasing, the size of the workforce is not increasing.
France will (have to) move to 64 and later to 67. If not this year, then in a few years.
Any many EU countries might even have to move to 70, Germany for sure.
People live longer (great), so they also have to work longer.
Edit: Also this math involve predictions about demographics evolution over the next decades in a global warming and war in europe context. Both can result in unpredictable populations movements. This is never simple ask any demographer around.
Edit2: What is complicated about politics especially in french strong state tradition is that laws reform are precisely meant to alter the input data of your model, often with unforeseen side effects, so it's not simple math ask any historian around.
This especially worst in France because it's a known and widely discussed issue that the government is indirectly doctoring some key statistics like unemployment data. Changing the metric while you are rolling out a reform is at this point a patented french strategy to prevent any citizen to evaluate a new policy.
That seems absurd, and it seems like if that is truly the case, then a lot of other things should change before this.
France does have a history of not accepting crap from the ruling class with bloody results for the ruling class. Less the ruling class forget that.