Kernrechtsfrage
Whether the revised full disability pension had to start earlier than 2007-12-01
Extrahierter Entscheid
No. The claimant did not show a legally relevant change in earning capacity or health that would justify a revision earlier than the cantonal court fixed.
Extrahierte Begründung
The work capacity remained at 50% for light adapted work; the higher invalidity degree resulted only from changed statistical wages and a newly allowed disability-related deduction, which is irrelevant without a changed capacity.