Questão jurídica principal
Whether arrears of an invalidity pension may be offset against repayment claims for wrongly paid supplementary AHV pensions despite an alleged impact on the subsistence minimum.
Decisão extraída
The offset is permissible. In this setting, the subsistence-minimum protection does not bar the offset because it concerns the replacement of mutually exclusive benefits and avoids unjustified accumulation caused by timing differences.
Fundamentação extraída
The court distinguished cases involving offsets against contribution debts, where the subsistence minimum can matter, from cases involving repayment of benefits that were later superseded by another mutually exclusive benefit. Here the two benefits exclude each other; allowing the insured to invoke the subsistence minimum would unjustifiably preserve a double benefit merely because the decisions were issued at different times.