What I found interesting was the reason for the industrial action, namely "having to work till 60 before getting pension".
I might have been able to perform firefighting duties ( carrying bodies out of burning buildings etc) aged 45 to 50. Not a cat in hells chance aged 55 to 60. Would I have been retired early on medical grounds/sacked?
This is a loaded question for all people working longer before they get a pension, some will be able to work through having good physical and mental abilities (my great uncle was fitter than most 50 years olds at 80 and as sharp as a pin) and some won't. With some it will be be due to bad lifestyles with other it will just be bad luck.
I agree that public servants should not be able to strike, even better would be the banning of all strikes. In the private sector it has always seemed perverse to me to hurt the money making machine (the company) to get more out of it. I accepted that there are good and bad employers, but far too many strikes seem to be political or to keep unacceptable vested interests and obsolete working practices, which is bad for the company and society as a whole.
Even better would be to ban all trade unions, have better management worker relations with formal systems like they have in Germany and as a last resort independent binding arbitration.