Questão jurídica principal
Whether the cantonal court's determination of the wife's maintenance was arbitrary
Decisão extraída
Yes. The appellate court could not treat CHF 4,000 as the wife's 'proper maintenance' and limit support accordingly without sufficient factual basis or clarification of the calculation method.
Fundamentação extraída
The lower court contradicted the first instance's own calculation logic, ignored that the amount had been derived from an excess-sharing model, and failed to explain or verify the factual basis for converting that amount into a ceiling for the wife's maintenance.