Fusion of powers

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Fusion of powers is a feature of some forms of government, where some branches of government are integrated or in a hierarchical relationship, instead of separated. In particular, the term is used to describe the relationship of the legislative and executive branches in parliamentary system, especially the Westminster system. In the Westminster system, members of the executive must also come from the legislature, meaning fusion is not only found in the institutional relationships, but also personal overlap. The system first arose as a result of political evolution in the United Kingdom over many centuries, as the powers of the monarch became constrained by Parliament, removing the separation of powers between the two branches. By the time Bagehot coined the term, fusion of the political branches was near complete, which he described as the "efficient secret" of the Westminster model. Fusion of powers also used to be present between the judiciary and the legislature (with parliamentary supremacy...

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