The ethics of interest: Rethinking wealth, justice, and responsibility

By Moin Qazi* 

“Money was intended to be a means of exchange, not to breed money.” — Aristotle

Across civilizations, few economic practices have provoked as much moral unease as usury—the extraction of gain from another’s need. It is not merely a financial device; it reflects how a society understands justice, obligation, and human worth. When money begins to multiply without labour, without risk, and without accountability, it ceases to serve life and instead reshapes it in its own image. What appears efficient on the surface often conceals a deeper imbalance—one in which gain is detached from responsibility, and accumulation from contribution.

This unease is neither incidental nor confined to any one tradition. Within the moral universe of the Qur’an, the prohibition of usury is framed not as a technical restriction but as an ethical boundary—one that protects the vulnerable from exploitation disguised as transaction. The gravity of this prohibition is further underscored in the teachings of Prophet Muhammad. In a rigorously authenticated narration recorded in Sahih Muslim, the Prophet is reported to have cursed the one who consumes usury, the one who pays it, the one who records it, and the two who witness it—declaring them equal in moral culpability. In another widely cited narration (reported in Sunan Ibn Majah and Musnad Ahmad), even a single dirham of usury is described as more grievous in the sight of God than repeated grave immorality—an expression not of rhetorical excess, but of moral urgency.

The most severe setback in my own life arose at a moment when I had committed myself to an uncompromising campaign against usury. What I had anticipated would invite principled engagement instead provoked resistance from within my own family. Most unsettling was the conduct of my own sisters—whom I had long regarded as exemplars of restraint and virtue—yet who appeared, with quiet persistence, to obstruct and undermine the effort. It was not open opposition that proved most disquieting, but its subtlety: the silences, the deflections, the gradual withdrawal of support.

More troubling still was the conduct of my nephew—himself a significant beneficiary of the very practices I sought to challenge—who abused the trust reposed in him and, in an act marked not by courage but by evasion, chose to undermine from behind what had been conceived in sincerity. What was at stake was not ambition, nor advantage, but a mission grounded in the ethical vision of the Qur’an—a purpose that sought neither personal gain nor recognition, but alignment with principle. That such an effort should encounter obstruction not from declared adversaries but from within the intimate circle of kinship lends the experience its deepest gravity.

There are betrayals that wound, and there are those that unsettle one’s very understanding of trust. The latter are seldom inflicted by distant opponents; they arise, more often, from those admitted into one’s inner circle—those to whom responsibility is entrusted not merely out of convenience, but from an assumption of shared values. When that assumption fails, the injury is not confined to the event itself; it extends into one’s conception of loyalty, integrity, and the fragile architecture of human bonds.

It is in the face of such moments that the words of the Qur’an (Surah Aal-e-Imran 3:173) acquire a living and almost defiant clarity. Revealed in the aftermath of the Battle of Uhud—when fear was deliberately magnified to unsettle the believers—it records not collapse, but moral resolve:

“Hasbunallahu wa ni‘mal wakeel” — Allah is sufficient for us, and He is the best disposer of affairs.

The warning they received was meant to instill fear; instead, it deepened their reliance on what does not falter. There is a quiet but profound lesson here: when reliance shifts from fragile human assurances to a higher moral anchor, the capacity of betrayal to define one’s inner state is diminished. The act remains what it is—but it no longer governs the meaning of one’s response.

In that sense, the verse does not erase pain; it reorders it. It transforms a moment of rupture into one of moral clarity—where dignity is preserved not through reaction, but through an unshaken alignment with truth.

And perhaps this is the final paradox: that a struggle undertaken in the name of justice may itself invite injustice; that a call to ethical reform may expose the quiet accommodations of those closest to us. Yet if the moral vision remains intact, the apparent setback is not defeat but disclosure—a revealing of what stands firm and what merely appeared to do so. In such moments, the measure of success is no longer external validation, but fidelity to principle. And in that fidelity lies a form of victory that no act of betrayal, however intimate, can ultimately undo.

This tension finds powerful expression in The Merchant of Venice by William Shakespeare. Through the figure of Shylock, the play explores what happens when human relationships are reduced to enforceable claims. The infamous bond—a pound of flesh in default of repayment—shocks not because it is unrealistic, but because it reveals the latent extremity within contractual thinking when it is stripped of mercy. The law, when emptied of compassion, can become as unforgiving as violence itself.

Shylock’s defence is not without logic. He speaks in the language of thrift and calculation, suggesting that gain, if lawfully pursued, justifies itself. Yet the play exposes the fracture beneath this reasoning. When financial obligation overrides human connection, lending ceases to be relational and becomes adversarial. Shylock himself concedes this with unsettling candour: interest thrives where trust has already been withdrawn. Profit, in such a setting, does not merely reflect exchange—it signals the erosion of moral reciprocity.

It is precisely this rupture that Islamic teaching seeks to prevent. The prohibition of riba (usury) in the Qur’an is not incidental but foundational: “Allah has permitted trade and forbidden usury” (Qur’an 2:275). The distinction is subtle yet profound. Trade involves effort, exposure to risk, and the creation of value; usury secures return without sharing burden. One sustains mutuality, the other disrupts it.

The Qur’an reinforces this warning through powerful imagery: “Those who consume usury will not stand except as one stands who is being beaten by Satan into insanity…” (2:275). The language evokes moral disorientation—a loss of balance between gain and justice. The gravity intensifies further: “O you who believe, fear Allah and give up what remains of usury… and if you do not, then be informed of a war from Allah and His Messenger” (2:278–279). Few prohibitions are framed in such uncompromising terms, underscoring that usury is not an isolated vice but a systemic harm.

The teachings of the Prophet Muhammad deepen this ethical horizon. In Sunan Ibn Majah (Hadith 2274), he warns: “Usury has seventy-three categories, the least of which is like a man committing adultery with his mother.” In another narration (Sahih Muslim, Hadith 1598), he curses not only the one who consumes usury but also the one who pays it, records it, and witnesses it, declaring them equal in moral responsibility. These traditions shift the focus from isolated acts to networks of participation, recognising that injustice often persists through systems rather than individuals alone.

Yet the modern financial world complicates this clarity. Participation in such systems is rarely explicit or intentional. Consider the ordinary provident fund: few would refuse the interest credited to their savings, particularly when such returns exceed those available through conventional deposits. It appears prudent, even responsible. Yet these returns do not emerge in isolation; they are generated within a broader system of lending—often involving borrowers who bear disproportionate risk. The gain of one is quietly linked to the burden of another.

This is the subtle dilemma of contemporary economic life—participation without visibility. One may not intend harm, yet one may still be embedded within structures that perpetuate it. The ethical question, therefore, shifts from personal intention to systemic awareness. It is no longer sufficient to ask whether one is directly responsible; one must also ask what kinds of arrangements one sustains, even indirectly.

The enduring critique of usury—from Aristotle to Shakespeare to the Qur’anic injunctions—converges on a single insight: economic life cannot be severed from moral responsibility without consequence. A system that guarantees gain without risk invites imbalance. It replaces mutual obligation with calculated advantage and gradually erodes the ethical foundations of society.

And so the final reckoning is not financial, but moral. A society may grow wealthier while becoming inwardly poorer, mistaking accumulation for progress and yield for justice. When profit is insulated from responsibility, it acquires a quiet legitimacy that is rarely questioned and deeply consequential. Over time, this normalization does not merely reshape markets—it reshapes conscience.

The real danger of usury lies not in its visibility but in its acceptance. It is not the excess that corrodes society, but the ordinary—the routine transactions that pass without reflection, the small gains that carry unseen costs. When exploitation becomes procedural, it no longer appears as injustice; it appears as order.

To resist this is not merely to reject a financial practice, but to recover a moral orientation. It is to insist that gain must remain accountable to justice, that wealth must not be severed from responsibility, and that human relationships must never be reduced to instruments of profit. For when money forgets its purpose, it does not merely distort economies—it diminishes the very idea of what it means to live ethically within them.

In the end, the question is not merely how money is earned, but how it is justified. When money forgets its purpose, it acquires a quiet power—to reorder values, to redefine relationships, and to measure worth in terms that exclude compassion. Usury, then, is not simply an economic error; it is a moral displacement. And a society that normalises it risks not only financial injustice, but a deeper loss—the slow erosion of its moral centre.

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*Development professional