Kernrechtsfrage
Whether the valid income was correctly determined for the disability comparison.
Extrahierter Entscheid
The prior findings on the valid income could not stand because the lower courts failed to clarify the employer's confirmed hypothetical wage development and the nature of certain allowances; the case had to be remitted for further fact-finding.
Extrahierte Begründung
The investigation duty was violated. Concrete employer information suggested a probable wage trajectory, so the valid income had to be reassessed on an evidentiary basis.