If the Brits finally decide to leave, as the most recent polls seem to suggest, it will be due to three main factors. The first is the miscalculation that EU core countries, and Germany in particular, have made in continuing to push for a Frankfurt/Berlin centric fiscal policy. The second is how Europe has quickly become a scapegoat for inefficiencies, a feeling that is partially true and due to multiple level of government that obviously costs more and takes more time. Finally, we have reached this low point in political strategy, as a result of a colossal miscalculation of David Cameron.
The problem with British leaders, unlike some continental ones, is that they will admit a loss when it happens, and he will have to resign if he loses the referendum. In this case, brace for volatility.