Social security benefit appeal dismissed; court ruled bonus was salary component, not excluded by collective agreement.

The Supreme Court dismissed the cassation appeal regarding the calculation of a sick pay benefit. The Social Insurance Institution excluded a monthly bonus from the benefit base, arguing it was a variable component subject to collective agreements, while the plaintiff argued she had a right to it regardless of sick leave. The court determined the bonus was actually a fixed salary supplement paid even during illness, as evidenced by the plaintiff receiving it despite being absent for 89 days in late 1994. Consequently, the bonus must be included in the benefit base, and the lower courts correctly applied the law.