Kernrechtsfrage
Whether the Valais labor court had subject-matter jurisdiction over the employee's wage claim despite the dispute turning on source-tax rules.
Extrahierter Entscheid
Yes. The claim was a contractual salary claim; the labor court could decide the preliminary tax questions needed to determine whether wages remained unpaid.
Extrahierte Begründung
Jurisdiction depends on the legal relationship between the parties. Although source-tax obligations arise from public law, the employee sought payment of the difference between salary actually paid and salary owed. A court competent for the main claim may also decide incidental public-law questions unless procedural law provides otherwise and the competent administrative authority has already decided them.