I think they want Old Pension Scheme back. But, IIRC, it was reverted multiple years ago because it was causing a huge drain on government budget. Eithercase, there are multiple folks willing to work, that they can fire the entire workforce and bring in a new one. The day they do this, the new workforce will know that strikes are not a solution and won't resort to this. Sure, it will break railways in that region for few days. But better in the long run, IMO.