Brexit is a good example of that sort of policy, but it's far from the only one. Even in that case, it's not the decision itself that's the issue but the cavali

Brexit is a good example of that sort of policy, but it's far from the only one. Even in that case, it's not the decision itself that's the issue but the cavalier implementation of it – stuff like introducing lots of red tape for exports, hand-waving away the idea that exports will be affected, and then being shocked when exports collapse. In this specific case it's not really a "strong dollar/energy crisis" story – the proximate cause is a massive overnight shift in UK government fiscal policy to "let's cut taxes and not spending, and it will all work out" that's obviously spooked everyone.