Lecture 11: The Functions of Government and the Principles of Taxation

1. Introduction: Defining the Proper Sphere of Government

We arrive now at the final and most contested topic in political economy: defining the proper limits of government’s functions. This question is defined by two opposing tendencies. On one hand, impatient reformers are constantly tempted to stretch the province of government. On the other hand, a history of government interference for purposes other than the public good has created a spirit of resistance that seeks to restrict state action to the narrowest possible bounds, such as mere protection from force and fraud. This lecture will first outline what Mill considers the necessary functions of government and then delve into the principles that should guide a just and efficient system of taxation.

2. Necessary vs. Optional Functions of Government

Mill distinguishes between two types of government functions:

• Necessary Functions: These are duties that are inseparable from the very idea of a government.
• Optional Functions: These are areas where government intervention is a matter of debate, and its expediency must be proven.

Even the “necessary” function of providing protection against force and fraud, he notes, is far more multifarious than it first appears. It implicitly includes establishing and enforcing the entire legal framework of a society: the laws of property, inheritance, contract, and insolvency. Ultimately, Mill concludes that there is no simple rule; the only universal ground for all government action is “the comprehensive one of general expediency.”

3. The Economic Effects of Government Functions

The prosperity of a nation is profoundly affected not just by what a government does, but by how well it performs its duties.

• Insecurity: Where government fails to protect property, “the possessions of the weak are at the mercy of the strong,” and the incentives for industry are destroyed.
• Over-taxation: Simple over-taxation is a great evil, but it is less destructive than arbitrary exactions or taxes that are unpredictable and place industry at a disadvantage.
• Imperfections in Law: Mill points to the enormous economic harm caused by the “incognoscibility” of the law in England, to use Bentham’s term. The delay, vexation, and immense expense of the justice system, especially concerning real property, act as a heavy tax on citizens and a drag on economic activity.

4. Adam Smith’s Four Maxims of Taxation

Mill endorses Adam Smith’s four famous principles as the foundation of any sound taxation system:

1. Equality: Citizens should contribute in proportion to their respective abilities.
2. Certainty: The tax owed should be clear and not arbitrary.
3. Convenience of Payment: The tax should be levied at the time and in the manner most convenient for the contributor.
4. Economy in Collection: The tax should take as little as possible from the people beyond what it actually brings into the public treasury.

5. The Principle of Equal Sacrifice

Mill’s most important contribution to the theory of taxation lies in his interpretation of Smith’s first maxim. He argues that true equality of taxation means equality of sacrifice. A simple flat-rate percentage tax does not achieve this, as taking 10% from a small income is a far heavier burden than taking 10% from a large one.

To achieve equal sacrifice, Mill adopts a proposal from Jeremy Bentham:

• Leave a “certain minimum of income, sufficient to provide the necessaries of life, untaxed.”
• Taxation should then apply only to the surplus income above this minimum.

Furthermore, Mill argues powerfully for exempting savings from income tax. His reasoning is that savings, once invested, are already taxed on the interest they produce. To tax both the principal sum being saved and the future income from it is to “tax the same portion of the contributor’s means twice over.” To illustrate Mill’s point on double taxation: if you earn £100, save £10, and are taxed 10%, the current system taxes the initial £100 (taking £10) and then taxes the income from the invested £10 in perpetuity. Mill argues only the £90 you spend should be taxed initially.

6. A Special Case: Taxing the “Unearned Increment” of Land

Mill puts forward a controversial proposal for a special tax on land. His reasoning is that the rental value of land constantly tends to increase due to the general progress of society, an increase that occurs “without any exertion or sacrifice on the part of the owners.” Landlords, he memorably states, “grow richer, as it were, in their sleep.”

His proposal is to:

1. Conduct a general valuation of all land to establish its current market price.
2. After an interval, estimate the “spontaneous increase” in rent that has occurred due to societal progress.
3. Impose a special tax to claim this future unearned increment for the State.

7. Conclusion and Transition

The manner in which a government performs its core functions—particularly in establishing the rule of law and the principles of taxation—has an immense impact on the economic life of a nation. Establishing the principles of a just system of taxation is a necessary precursor to addressing the final, broader question: beyond these core functions, in what other areas is government intervention legitimate? This sets the stage perfectly for our final lecture on the famous laisser-faire principle.

Lecture 12: The Grounds and Limits of the Laisser-Faire Principle

1. Introduction: Beyond “Anarchy plus the Constable”

We conclude our exploration of Mill’s thought by tackling the central question of modern political philosophy: what is the proper scope of government action? Mill rejects the simplistic definition that would restrict government merely to protection against force and fraud—a state of “anarchy plus the constable.” Instead, he introduces the principle of Laisser-Faire (“let it be”) not as an absolute dogma, but as the “general practice.” Any departure from it, he argues, is a “certain evil” that must be justified by demonstrating that it will produce “some great good.” This final lecture will analyze both the powerful general objections to government interference and the crucial exceptions where such interference is not only permissible but necessary for the public good.

2. The General Case Against Government Interference

Mill synthesizes the case for non-interference into three primary objections:

1. The Dangers of Compulsion: He distinguishes between authoritative interference (commands and prohibitions) and non-authoritative interference (providing advice and information). The former, being a restriction on liberty, has a much narrower legitimate sphere.
2. Superiority of Individual Agency: In most of the business of life, people “understand their own business and their own interests better, and care for them more, than the government does.” In the common operations of industry, government agency is almost always inferior to private agency.
3. The Importance of Human Development: This is his most profound objection. The business of life is “an essential part of the practical education of a people.” An over-reliance on government stunts public intelligence, enterprise, and the capacity for collective action, fostering an “appetite for place and power” rather than a spirit of freedom and self-reliance.

3. Erroneous Grounds for Interference: The Doctrine of Protectionism

Mill uses the policy of Protectionism as his chief example of government interference grounded on erroneous theories. The fallacy of protectionism is that it forces a country’s resources to be used inefficiently. Prohibiting imports renders the “labour and capital of the country less efficient” by compelling a waste of those resources to produce at home what could have been bought more cheaply from abroad. The consumer pays a tax not only for the government’s revenue but also for the protected monopolist’s “laziness and incapacity.” Other flawed interferences he critiques include Usury Laws and attempts to fix the price of food.

4. Major Exceptions to the Laisser-Faire Principle

The presumption in favour of non-interference is strong, but not absolute. Mill details a series of major exceptions, where the general objections fail and intervention becomes justifiable. Each is grounded on a clear principle:

• Principle 1: The Consumer is Not a Competent Judge. When the person buying a commodity is not qualified to judge its quality, the market may fail. This applies to complex goods like medicine, but most importantly for Mill, to education. This justifies a government role in setting standards and even compelling elementary instruction.
• Principle 2: The Individual is Not Acting for Their Own Interest. When individuals make decisions not for themselves but for others whose interests are not protected, the state may intervene. This is the justification for laws against child labour and for the protection of animals.
• Principle 3: The Consequences Extend Indefinitely Beyond the Individual. When individual acts have long-term consequences for the nation or for posterity, society in its collective capacity must provide. This justifies public charity (Poor Laws) and government-managed colonization.
• Principle 4: No Individual is Specially Interested in Performance. When a service is of great public value but offers no clear path to private remuneration, the government must undertake it. Examples include scientific exploration, building lighthouses, and funding a “learned class” through universities.
• Principle 5: Private Agency is Non-Existent. In backward societies, where the public is “too poor… too little advanced in intelligence… or not sufficiently practiced in joint action,” the government may need to establish essential infrastructure like roads or schools, simply because private individuals will not do so.

5. Course Conclusion: Mill’s Vision of a Just and Progressive Society

Across the vast intellectual landscape of the Principles, a clear vision emerges. Mill’s nuanced, case-by-case exceptions to laissez-faire are the practical application of his utilitarianism, finally resolving the “inconsistency problem” we introduced in our first lecture. His principle of liberty was never intended as an absolute dogma, but as a powerful general rule within a broader framework of social expediency.

His work is an expression of profound faith in the possibility of human progress, a progress driven not by blind economic forces but by the deliberate cultivation of intelligence, justice, and self-governance. He demonstrates that the laws of economics do not condemn humanity to a zero-sum struggle for subsistence. Rather, they define the conditions—control of population, justice in distribution, and wise limits on government—under which a better world is possible. The Principles is not merely a description of an economy; it is an enduringly relevant roadmap for achieving a prosperous, free, and equitable society.