The survey data indicates a simple answer: voters — to a large extent — are convinced that UBI is the social policy of the future.
The Swiss Universal Basic Income Vote 2016: What’s Next?
Che Wagner

I thought the graph just showed that voters think this issue isn’t going away. I could imagine asking voters if a polygamy will be voted on again and getting the same response. It doesn’t mean polygamy is the policy of the future, it just means voters think there is at least portion of the population who will eventually bring it to a vote.