Kernrechtsfrage
Whether the conditions for revision of the half disability pension were met under Art. 17 ATSG and Art. 87 IVV.
Extrahierter Entscheid
No material change in the factual circumstances was proven; the lower court relied on a different assessment of an essentially unchanged condition.
Extrahierte Begründung
The medical evidence did not show a relevant improvement in health or work capacity; at most it reflected a different appraisal. The insured's employment situation had in fact worsened after losing his 50% job.