However, they still have similarities in terms of purpose, democratic principle and authority granted by the constitution. According to Roskin, Cord, Medeiras, and Jones (1994), the task of government is to provide for the life, stability, economic and social well-being of all its citizens. Both systems emphasize the improvement of society to ensure that citizens obtain their rights and meet what society needs. Regarding these purposes, the government, both parliamentary and presidential, has established policies, plans and constitutions to manage state affairs. Furthermore, the parliamentary and presidential electoral system requires that the person who wants a government position must obtain a majority of citizens' votes. Elections must be conducted fairly and cannot be biased. The parties that contested the elections should be given the same equality to promote their person. Charles (2003) coined that government should be elected based on critical democratic principles and competitive elections to determine who governs. The next similarity is the authority given by the constitution. Both systems have the power granted by law or constitution to govern the state. In this context, the Head of State and the Head of Government are required to manage the State and society according to the rules established by the Constitution. They cannot break the constitution because their power is still in the constitution