Questione giuridica chiave
Whether the cantonal court could annul the contribution assessment without hearing the five affected persons
Decisione estratta
No. In parity-contribution disputes, affected employees generally must be notified and allowed to participate, subject to limited practical exceptions; the cantonal court should not have decided without hearing them.
Motivazione estratta
The omission to notify the persons concerned and to invite them to comment on the appeal violated established case law on the right to be heard in contribution-assessment proceedings.