Kernrechtsfrage
Whether the half disability pension could be revised and discontinued under Art. 17 ATSG.
Extrahierter Entscheid
The pension could not be revised away because the medical reports showed only a different assessment of an essentially unchanged condition, not a relevant change in health or earning capacity.
Extrahierte Begründung
Art. 17 ATSG requires a material change in the factual circumstances. The later psychiatric expert disagreed with the earlier assessment and diagnostic weight, but did not establish a real deterioration or improvement since the pension award.