Well, I have to admit I haven't been to all of Switzerland, but everywhere I went there was universal, free, socialized medicine. And a universal, comprehensive social welfare system. And universal, comprehensive government run retirement benefits, and post-secondary educational funding. And universal, government run disability coverage, unemployment coverage and maternity leave. Admittedly the Social Democrat party is only the second largest in the country, and there is a 2 year waiting list to get your child into subsidized, state-run daycare, so it's less socialist than Germany, for example, or Sweden.
Greece actually spends less of its GDP on social programs and is lower on it's after-tax gini co-efficient than Switzerland, so you and I must be defining "socialism" very differently. What measures are you using?