Organization of ministries in the presidential government system and a model proposal

Government systems are basically divided in to three according to the fact that whether the separation of powers principle is keen or not. The first of these is presidential system which accepts the strict separation of powers principle. The second one is the parliamentary system that is experiencing a mild separation of powers and there is no clear differentiation between the executive branch and the legislative branch. The third one is semi-presidential system, derivative of presidential system in which head of the state is elected by the public and the parliamentary system. Countries revise and apply one of these government systems that fits their political and executive needs. The applied system directly effects structure and functioning of public administration in the country. Turkey has always been in a search for the suitable system during its constitutional process for almost 150 years. After proclamation of the first Constitutionalist period, parliamentary system was adopted, after opening of parliament in 1920, Assembly Government system was adopted, between 1924 and 1961 there was a mixed constitution of Assembly Government system and parliamentary system, with 1961 constitution a parliamentary system called "Westminster Model" was adopted, after the referendum in 2007 semi-presidential system was adopted and since 2018 the new government system is in charge. Together with the new system called Presidential Government System, there has been big changes in public administration The aim of this study is to reveal the differences and similarities between the ministry structure of the Present Turkish Presidential government system and the ministry structures in the previous Turkish government systems. It is also aimed to propose a model in order to create an effective and efficient ministry structure in the presidential government system. For this purpose, the required data were collected by secondary literature review method in this study in which qualitative research methods were used.