It’s not always the unexpected that gets governments in trouble — often enough it’s their own bad judgement, poor timing or general clumsiness that gets in the way. But the unanticipated does happen a lot.
Parties and politicians put time and effort into concocting a set of policies aimed at winning votes by proposing remedies to problems identified as occupying top rungs of current voter concern. If they’re lucky they get elected, presumably intending to put those policies into effect at the earliest opportunity. Then the world shifts and pulls the rug from under them.
