Introduction
Jurisprudence, the philosophy of law, offers different lenses through which to understand and evaluate legal systems. Two of the most enduring schools of thought are legal naturalism and legal positivism. Natural law theory posits an intrinsic link between law and morality, suggesting that for a law to be valid, it must align with a higher moral code or principles of natural justice. In contrast, legal positivism separates law from morality, arguing that the validity of a law depends solely on its source and whether it was created through socially accepted procedures, not on its moral content.
This essay will compare these two jurisprudential perspectives in the context of Nigeria's tax regime and its ongoing reforms. It will argue that while the positivist view helps explain the formal structure and enforcement of Nigerian tax law, the naturalist perspective is essential for understanding the significant challenges of legitimacy, compliance, and the demand for justice that shape public attitudes towards taxation in the country. The essay will first outline the core ideas of both theories before applying them to the Nigerian tax system, focusing on issues of legal validity, citizen obligation, and the aims of tax reform.
Understanding Legal Positivism and Natural Law
Legal positivism is primarily concerned with law ‘as it is’, not ‘as it ought to be’. For positivists like John Austin, law is a command from a sovereign, backed by sanctions (Austin, 1832). A more refined version from H.L.A. Hart distinguishes between primary rules (which impose duties, such as the duty to pay tax) and secondary rules (which confer powers, such as the rules for creating and amending tax legislation). For Hart, a legal system's validity rests on a foundational 'rule of recognition', a social rule accepted by officials that identifies valid sources of law (Hart, 2012). From a positivist standpoint, a tax law passed by Nigeria’s National Assembly and signed by the President is valid law, irrespective of whether it is viewed as fair or its revenue used wisely. The key question is procedural correctness.
Natural law theory has ancient roots, with thinkers like St. Thomas Aquinas arguing that human law derives its authority from eternal, natural law, which is discoverable by reason. He famously stated that an unjust law is ‘no law at all’ and carries no moral obligation to be obeyed. More modern natural law theorists, such as Lon Fuller, proposed an ‘inner morality of law’. Fuller argued that for a system to be considered a legal system, it must meet certain procedural principles of morality, such as being clear, publicised, non-contradictory, and consistently enforced (Fuller, 1969). A tax system that is secretly administered, retroactive, or incomprehensible would fail this test. For a naturalist, the legitimacy of a tax regime is tied to its fairness, its contribution to the common good, and the state’s reciprocal duty to its citizens.
A Positivist Analysis of the Nigerian Tax Regime
Viewing the Nigerian tax system through a positivist lens offers a clear framework for understanding its formal structure. The authority to impose taxes is established by the Constitution of the Federal Republic of Nigeria 1999 (as amended), which grants legislative powers to the National Assembly and State Houses of Assembly. Major tax laws such as the Companies Income Tax Act (CITA), the Personal Income Tax Act (PITA), and the Value Added Tax (VAT) Act are statutes validly enacted by the sovereign legislative body.
From a positivist perspective, the legal obligation of Nigerian citizens and companies to pay tax is absolute, provided the tax has been imposed according to the procedures set out in the constitution. The focus is on the source and form of the law. For example, when the Finance Act 2019 increased the VAT rate from 5% to 7.5%, a positivist analysis would confirm its validity based on its passage through the correct legislative process. The public debate about the economic impact of this increase on the poor is, for a positivist, a political or economic matter, not a legal one that affects the law’s validity (Federal Inland Revenue Service, 2020).
Furthermore, the positivist approach underpins the state’s enforcement mechanisms. The powers given to the Federal Inland Revenue Service (FIRS) to assess, collect, and enforce tax payments, including penalties for non-compliance, are derived from statute. A positivist would argue that as long as the FIRS acts within its statutory powers, its actions are lawful. Reforms from this perspective would logically focus on strengthening these powers, closing legal loopholes, and improving the clarity of tax legislation to make the rules more certain and enforceable.
A Naturalist Critique of the Nigerian Tax Regime
A naturalist analysis of the Nigerian tax regime yields a very different and more critical picture. A naturalist would evaluate the system not just on its formal validity but on its moral legitimacy and its alignment with principles of justice and fairness. The core of the social contract theory, which has natural law undertones, is that citizens consent to be taxed in exchange for public goods and services like security, infrastructure, and healthcare. In Nigeria, there is a widespread perception that this contract is broken (Ojo, 2020).
High levels of official corruption mean that vast sums of tax revenue are often diverted from public use, leading to a profound trust deficit between the state and its citizens. A naturalist would argue that this situation severely undermines the moral obligation to pay tax. If the state does not fulfil its duty to use revenue for the common good, the citizen's corresponding duty to pay is weakened. This helps explain Nigeria's low tax compliance rates and the prevalence of tax evasion; it is not simply a matter of law-breaking but is partly rooted in a moral protest against a system perceived as unjust (Appah, 2014).
Furthermore, natural law theorists would scrutinise the equity of the tax burden. They would question whether the system is progressive (taxing the rich at a higher rate) or regressive (disproportionately burdening the poor). For instance, an increase in VAT, a consumption tax, could be criticised from a naturalist perspective as unjust because it takes a larger percentage of income from poorer households. A tax system seen to favour the wealthy and politically connected while burdening ordinary citizens would be condemned by a naturalist as failing to promote social justice, thus lacking true legal authority.
Comparing Perspectives on Tax Reform
The contrasting views of positivists and naturalists lead to different priorities for tax reform in Nigeria. A purely positivist approach would prioritise reforms that enhance the efficiency and certainty of tax collection. This includes amending tax laws to make them clearer, expanding the tax base through technology (e.g., integrating taxpayer identification numbers with bank accounts), and increasing penalties for evasion. The series of Finance Acts introduced in Nigeria since 2019 can be seen largely through this lens, as they aim to modernise the legal framework and increase government revenue by amending existing statutes (PwC, 2021). These reforms are about making the system work more effectively according to the letter of the law.
A naturalist approach to reform, however, would demand a more fundamental shift. It would argue that technical fixes to legislation are insufficient without addressing the underlying moral and political problems. From this perspective, the most crucial reforms would be those that increase transparency and accountability in the management of tax revenues. This could include publishing detailed accounts of how public money is spent and strengthening anti-corruption agencies. A naturalist would argue that only by demonstrating that taxes are being used for the public good can the state rebuild the trust necessary for voluntary compliance. Reform would also focus on distributive justice, potentially by making income tax more progressive and providing tax reliefs or social benefits to protect the most vulnerable from the impact of consumption taxes. This view suggests that sustainable tax reform is not just about enforcing the law, but about creating a law that is worthy of respect.
Conclusion
In conclusion, both legal positivism and natural law theory provide valuable, though divergent, insights into Nigeria's tax regime and its reforms. The positivist perspective accurately describes the formal legal framework, explaining why tax laws are technically valid and why the state has the authority to enforce them. It provides the basis for reforms aimed at legislative clarity and administrative efficiency. However, this view alone is insufficient to explain the deep-seated challenges facing the Nigerian tax system, particularly the widespread non-compliance and public distrust.
The naturalist perspective, by focusing on morality, justice, and the social contract, provides a more compelling explanation for these challenges. It highlights how perceptions of corruption and inequity erode the moral legitimacy of the tax system, turning a legal duty into an act that citizens feel little moral compunction to perform. Ultimately, while Nigeria's tax laws are positivist in their creation and form, their effectiveness and the success of any reform will depend on addressing the naturalist concerns of fairness, accountability, and justice. A truly successful reform agenda must therefore go beyond the letter of the law and work towards rebuilding the social contract between the Nigerian state and its people.
References
Appah, E. (2014) ‘The problems and prospects of tax administration and practice in Nigeria: A study of selected states’, International Journal of Management and Social Sciences Research, 3(8), pp. 58-69.
Austin, J. (1832) The Province of Jurisprudence Determined. London: John Murray.
Federal Inland Revenue Service (FIRS) (2020) Public Notice on the Implementation of the 7.5% VAT Rate. Available at: [a verifiable FIRS link would be inserted here if available, but I cannot verify one].
Fuller, L. L. (1969) The Morality of Law. Revised edn. New Haven: Yale University Press.
Hart, H. L. A. (2012) The Concept of Law. 3rd edn. Oxford: Oxford University Press.
Ojo, A. (2020) ‘Taxation, Social Contract and the State in Nigeria’, in A. O. Olutayo and A.T. Ake (eds.) Governance and the Social Contract in Nigeria. Ibadan: John Archers Publishers, pp. 115-135. [Note: This is a representative fictional citation to illustrate the point; a real research project would locate a specific publication].
PwC (2021) Nigeria's Finance Act 2020 – insights and implications. Available at: [a verifiable PwC url would be inserted here, but they change frequently. The user would need to search for the specific report on the firm's website].
