Questione giuridica chiave
Whether the appeal against the supplementary-benefits recalculation had to be upheld and the case remitted for a new calculation.
Decisione estratta
No. The recalculation was lawful, including the retroactive adjustment based on newly discovered pension income.
Motivazione estratta
The authority could revise the final decision retroactively because the new BVG information justified a procedural revision; the challenged calculation positions were otherwise correct.