Key legal question
Whether the claimant was entitled to a higher invalidity pension than the half pension granted.
Extracted holding
The case could not be finally decided because the income comparison had to be redone; the matter was remitted for a new pension decision.
Extracted reasoning
The medical assessment of 50% work capacity was binding, but the lower court wrongly derived invalid income from the former salary instead of using LSE tables, and it also fixed valid income without adequate clarification of the prior wage development.