An acquired right is only sacred for those who have more rights than the others. Otherwise it can happily wither away. For the esodati {“exited” people who got turfed out of their jobs a few years short of retirement age} the acquired right existed once upon a time, with a bundle of commitments signed by the companies and by the State, and then suddenly it’s no longer there. For the former parliamentarians getting an annuity, like Scalfari and Veltroni, the acquired right is immovable „the party has given it to me and woe betide anyone who touches it“.