Key legal question
Whether the insured was entitled to a half disability pension from 1 January 2008 after revision
Extracted holding
No. A pension revision cannot be based solely on a small change in statistical wage data; such changes do not reflect the insured person's personal circumstances.
Extracted reasoning
Although there were relevant changes in earning activity, the cantonal court relied only on a minor change in LSE-based statistical reference income. Statistical fluctuations alone are not revision grounds, even if they move the invalidity rate across the threshold.