Questione giuridica chiave
Whether the cantonal court had to examine the underlying AHV contribution liability again after reconsideration proceedings.
Decisione estratta
No. The reopened procedure only concerned the extent of the contribution amount, not the existence or principle of the employer's contribution duty.
Motivazione estratta
Under Art. 53 Abs. 2 ATSG, reconsideration of a final decision is discretionary and, when the administration reconsiders only part of the original ruling, judicial review is limited to the matters actually reopened or newly decided. The original finding that the employer owed contributions remained final.