Questione giuridica chiave
Whether the appellant was liable under Art. 52 AHVG for unpaid social security contributions of X.________ AG.
Decisione estratta
The appellant was liable because, despite knowledge of growing arrears, he failed to ensure payment or reduction of wages so that contributions could be paid.
Motivazione estratta
His conduct amounted to a serious breach of supervisory and payment duties; the damage was causally linked to that omission and no exculpation applied.