INTRODUCTION
The doctrine of separation of powers is a fundamental tenet of constitutional governance, designed to prevent the concentration of authority by dividing government functions among three distinct branches: the executive, legislature, and the judiciary. Montesquieu articulated this principle in The Spirit of Laws (1748) where he argued that freedom cannot exist when judicial power remains joined with legislative and executive authority. In Malaysia, this principle is adapted through the Westminster parliamentary system, which creates a modified separation rather than a strict division. Because Cabinet ministers must be sitting members of Parliament, executive dominance over the legislature is entrenched, making the judiciary the only branch capable of checking constitutional excess (Federal Constitution, Article 4(1)).
This dominance is further entrenched through ouster clauses in statutes such as the Prevention of Crime Act 1959 (POCA) and Security Offences (Special Measures) Act 2012 (SOSMA), which attempts to shield executive actions from judicial review, raising serious constitutional concerns. Moreover, the executive has historically abused its amendment powers under Article 159, using its two‑thirds majority in Parliament to alter the Constitution for political ends, most notoriously in 1988, when it amended Article 121(1) to strip the courts of their inherent judicial power.
Within this framework, the judiciary plays a particularly vital role. It is entrusted with interpreting the Constitution, resolving disputes, and protecting fundamental freedom against encroachment by the executive or legislature. Courts function as guardians of constitutional supremacy, ensuring that laws and governmental actions remain consistent with the nation’s highest legal document. Harding emphasized that judicial review in Malaysia is central to maintaining the rule of law, while Shad Saleem Faruqi highlighted that judicial independence is indispensable for democratic accountability. Public confidence in the legal system depends on the judiciary’s ability to act not merely as a neutral arbiter of disputes but as a central institution that upholds constitutional democracy. However, the development of the independence of the judiciary has not been entirely consistent, and this inconsistency itself remains a contentious issue in Malaysian constitutional law. The 1988 amendment to Article 121(1) removed the reference to the “judicial power of the Federation,” subordinating the judiciary to Parliament and exposing its vulnerability to executive interference. This crisis was compounded by the removal of Lord President Tun Salleh Abas and the suspension of senior judges, events that symbolized the erosion of judicial independence.
Nonetheless, the judiciary began reclaiming its role through the revival of the Basic Structure Doctrine. In Sivarasa Rasiah v Badan Peguam Malaysia & Anor [2010] MLJ 333, the Federal Court recognized that fundamental constitutional principles cannot be undermined by legislative action. This revival was further strengthened in later cases such as Semenyih Jaya Sdn Bhd v Pentadbir Tanah Daerah Hulu Langat [2017] and Indira Gandhi a/p Mutho v Pengarah Jabatan Agama Islam Perak [2018], where the courts reaffirmed judicial independence and constitutional supremacy. The evolution of this doctrine demonstrates the judiciary’s resilience, insisting on the core values of separation of powers and the rule of law despite past setbacks. Yet, the extent to which the Basic Structure Doctrine can shield the judiciary from executive dominance remains a live debate, reflecting the ongoing tension between constitutional ideas and political realities in Malaysia.
This essay argues that Malaysia’s separation of powers is marked by a persistent debate between executive dominance and judicial independence. While the 1988 constitutional crisis and the amendment to Article 121(1) exposed the judiciary’s fragility under political pressure, the revival of the Basic Structure Doctrine in cases such as Sivarasa Rasiah (2010), Semenyih Jaya (2017), and Indira Gandhi (2018) demonstrates its resilience in reclaiming constitutional supremacy. The judiciary’s trajectory highlights the contentious struggle between ouster clauses, constitutional amendments, and the courts’ role as guardians of the rule of law.
PART 1: The Constitutional Framework of Malaysia's Fusion of Powers and the Executive Dominance
The Malaysian constitution, heavily influenced by the Westminster model, does not enforce a strict separation of powers but rather a fusion between the executive and legislative branches. This overlap between the Executive and Legislature is not an accidental feature, instead it is a unique feature of the Parliamentary Democracy System that is explicitly codified within the Federal Constitution. The legal basis for this overlap is found in Article 43, which outlines the structure of the Cabinet. Article 43(1) provides that the Yang di-Pertuan Agong shall appoint a Jemaah Menteri (Cabinet of Ministers) to advise him in the exercise of his functions. According to Article 43(2), the Prime Minister and Cabinet ministers are appointed from among members of either House of Parliament or Senate.
The constitutional requirements for ministers to be sitting members of the Parliament reinforces the fusion of powers. Unlike the presidential system, where the executive is distinct from the legislature, in Malaysia’s Parliamentary system, key figures of the executive branch are simultaneously members of the legislative branch. This reflects Walter Bagehot’s description of the Westminster Cabinet as “a combining committee—a hyphen which joins, a buckle which fastens, the legislative part of the state to the executive part of the state.” This metaphor illustrates that this fusion ensures that those who exercise executive authority remain directly accountable to Parliament. This is further demonstrated in Article 43(2)(a) provides that the Yang di-Pertuan Agong shall first appoint as Perdana Menteri (Prime Minister) to preside over the Cabinet a member of the House of Representatives who in his judgment is likely to command the confidence of the majority of the members of that House. Thus, Malaysia operates under a system of executive and legislative fusion rather than a strict institutional separation between them.
However, the same constitutional overlap can cause executive dominance when the government commands a strong Parliamentary majority. In practice, the Prime Minister is usually the leader of the political party or coalition that commands a majority of seats in the Dewan Rakyat. This political reality, combined with the convention of strict party discipline enforced by a whip system, means that the executive can effectively control the legislative agenda. Members of Parliament (MPs) from the ruling coalition are expected to vote in favour of government bills, failing which they may face disciplinary action. Consequently, Parliament’s role in scrutinising the executive is weakened, and it often functions more as a 'rubber stamp' for policies and laws proposed by the Cabinet rather than a truly independent legislative body (Faruqi, 2008). This transforms the principle of parliamentary accountability into a mechanism for executive control.
This dominance is further solidified by the executive's control over parliamentary proceedings. The government sets the legislative timetable and can use its majority to pass bills quickly, limit debate, and reject motions from the opposition. This procedural control minimises the opportunity for effective scrutiny and dissent, reinforcing the executive's power over the law-making process. The result is what Lord Hailsham described in the UK context as an 'elective dictatorship', where the executive, once in power with a solid majority, faces few effective checks from the legislature it is supposed to be accountable to (Hailsham, 1976).
To further insulate its actions from challenge, the executive has frequently employed ouster clauses in legislation. These are provisions that explicitly seek to exclude or limit the jurisdiction of the courts to review the legality of executive decisions or actions taken under that particular statute. For instance, the Prevention of Crime Act 1959 (POCA) and the Security Offences (Special Measures) Act 2012 (SOSMA) contain clauses that attempt to make detention orders and other executive measures final and not subject to judicial review. By inserting such clauses, the executive branch attempts to place itself above the law, directly challenging the judiciary's constitutional role as the arbiter of legality and the guardian of fundamental rights under Article 4(1) of the Federal Constitution. While the courts have increasingly pushed back against such clauses, their existence in statutes demonstrates a clear legislative intent, driven by the executive, to concentrate power and avoid accountability.
Perhaps the most potent instrument of executive dominance is the power to amend the Constitution itself. Article 159 of the Federal Constitution allows for amendments with the support of a two-thirds majority in both Houses of Parliament. In a political landscape where a single coalition has historically held such a majority for long periods, this power has been used to reshape the constitutional framework to the executive's advantage. As noted by Harding (2012), this has led to amendments that have strengthened executive power at the expense of other institutions, including the judiciary. The ability to alter the supreme law of the land with a parliamentary majority demonstrates the ultimate expression of executive dominance, as it allows the government to change the very rules by which its power is meant to be constrained. This creates a fundamental tension, as the Constitution is intended to be a permanent charter of governance, yet it can be altered by the political will of a powerful executive.
References
Bagehot, W. (1867) The English Constitution. Chapman and Hall.
Faruqi, S. S. (2008) Document of Destiny: The Constitution of the Federation of Malaysia. Star Publications.
Hailsham, Lord. (1976) The Dilemma of Democracy: Diagnosis and Prescription. Collins.
Harding, A. (2012) The Constitution of Malaysia: A Contextual Analysis. Hart Publishing.
Montesquieu, C. (1748) De l'esprit des loix (The Spirit of Laws).
Legislation
Federal Constitution (Malaysia).
Prevention of Crime Act 1959 (Malaysia).
Security Offences (Special Measures) Act 2012 (Malaysia).
Cases
Indira Gandhi a/p Mutho v Pengarah Jabatan Agama Islam Perak [2018] 1 MLJ 545.
Semenyih Jaya Sdn Bhd v Pentadbir Tanah Daerah Hulu Langat [2017] 3 MLJ 561.
Sivarasa Rasiah v Badan Peguam Malaysia & Anor [2010] 2 MLJ 333.
