Supreme Court held supplementary disability pension is a work relationship obligation requiring joint employer liability.

The Supreme Court dismissed the cassation appeal filed by a successor company against a lower court judgment ordering joint liability for a supplementary disability pension. The plaintiff, a worker injured in a workplace accident, sought an increase in his pension, while the defendant argued that such a pension does not constitute a debt arising from the employment relationship under the relevant labor code provision. The court ruled that the supplementary pension compensates for lost earning potential inherent to the employment relationship, thereby falling within the scope of joint liability for debts created before the partial acquisition of the factory. Consequently, the successor company was held jointly liable with the original employer for the pension obligation.