Definitely a cultural thing, definitely not perverse incentives at all. See: <a href="http:&#x2F;&#x2F;askakorean.blogspot.com&#x2F;2013&#x2F;07&#x2F;culturalism-gladwell-and-airplane.html" rel="nofollow">http:&#x2F;&#x2F;askakorean.blogspot.com&#x2F;2013&#x2F;07&#x2F;culturalism-gladwell-...</a>