Switzerland's is interesting in that it goes a step further than Obamacare and really makes it compulsory, rather than simply fining you for not having insurance. A colleague was a postdoc there for a while and didn't understand the system, and after ignoring a few letters telling him he needed to buy insurance, he got a follow-up letter telling him that, as he had not yet enrolled in a plan, a default one had been chosen and he was now enrolled in it.