Government instability is the inability of a government to execute its mandates effectively. Parliamentary systems always suffer from government instability because the majority of legislators always have their say and sometimes the decisions made in this manner would go contrary to the abilities and capacities of the government.
Authoritarian regimes do not have party machinery or election systems that can mark the beginning or the end of a regime. Therefore, leaders in these regimes are in constant fears of a Coup détat because they always want to lead till their death. Such regimes do not have proper guidelines of how and when to hand over power to another