A theory of autocratic bad-decision-making (pdf):

Many, if not most, personalistic dictatorships end up with a disastrous decision … they typically involve both a monumental miscalculation and an institutional environment in which better-informed subordinates have no chance to prevent the decision from being implemented … repression and bad decision-making are self-reinforcing. Repressions reduce the threat, yet raise the stakes for the incumbent; with higher stakes, the incumbent puts more emphasis on loyalty than competence