Switzerland publicly voted on a strict 12x salary limit for CEOs compared to junior employees. The proposal was rejected after 65% of voters opposed it.
http://www.bloomberg.com/news/articles/2013-11-24/swiss-vote...
The article also says that the same law (with public voting) would have had a much larger success rate in Germany where apparently three quarters of the population would vote in favor.
I wonder how such a public vote would turn out in the USA.