4. November 2026
Social Injustice: When Income Inequality Becomes Unjust
Social injustice is a concept people invoke constantly yet rarely define. One scholar argues that political philosophers have written a great deal about social justice and very little about social injustice, and that the two are often wrongly treated as simple mirror images of each other. This explainer starts from that puzzle and asks what role income inequality plays in it. Measured by disposable income on a scale from 0 to 1, inequality in 2023 ran from 0.213 in the Slovak Republic to 0.618 in South Africa, with the OECD figure at 0.314. Whether such gaps amount to injustice, and how, is the question the sections below take up.
Die Ungleichheit der verfügbaren Einkommen reicht von 0,21 bis 0,62
ResearchOpening scene: one inequality, two lives
Picture two households in the same city, a few tram stops apart. In one, the parents' pay covers the rent, a tutor for the children and a cushion for bad months. In the other, every payday is spent before it arrives, and a broken boiler or a missed shift is a crisis. Both families live under the same laws, shop in the same streets and send their children to schools in the same city.
This is a sketch, not a documented case. It stands in for a pattern that the data can describe only in aggregate, and the chart below shows how widely countries differ in the spread of their disposable incomes.
The sketch also raises a question that is harder than it looks. Is the difference between the two households an injustice, or only an inequality? The answer depends on what happens in the space between them.
Defining the terms: inequality is not the same as injustice
The two households raise a question that is easy to get wrong: is every gap an injustice? The author of the source text says no. Emphasizing inequality as the essence of injustice is, in the text's words, tempting but unwise, and to conflate the two is "a common error in the literature".
The reasoning is simple. Just because there is inequality, it does not necessarily mean that an injustice is occurring. Parents and children are unequal, for example, yet that is not necessarily unjust. Even parents who treat their children differently are not automatically acting unjustly, unless they consistently favour one child over another in the distribution of family resources.
That is where the line is crossed. In households where boys are given a greater share of family resources, such as educational opportunities or nutrition, the text speaks of a clear case of injustice. Its conclusion is that an inequality can turn into an injustice, but an inequality per se is not an injustice. For income, this means a wide gap is a warning sign worth examining, not a verdict in itself.
From circumstance to act: when a gap becomes unjust
If a gap alone is not an injustice, something has to happen to turn it into one. The source text locates that step in how inequalities are used. Inequalities create the conditions within which relations of vulnerability and power arise, but an act of injustice occurs only when someone takes advantage of them to bring about a partial distribution of resources.
For this the author separates two things. The circumstances of injustice are the structural inequalities that create conditions of vulnerability and powerlessness, which make a partial distribution of resources possible. The act of injustice happens when a social actor exploits those circumstances to their own advantage, and so to the detriment of another actor.
Exploitation is the textbook case. The circumstances are the initial inequality in the basic distribution of productive assets and resources. The act itself reinforces the power relations between the two actors, creating a sense of humiliation, vulnerability and powerlessness in the exploited party, and it produces a distribution of resources that could never be justified to that party. The text says this holds at a personal level and at an institutional level alike. Applied to income, the question is therefore not only how wide the gap is, but whether someone uses it against the person on the other side.
Three dimensions: maldistribution, exclusion, disempowerment
The source text builds its account of social injustice on three dimensions. The first is maldistribution: the improper or injurious distribution of the benefits and burdens that arise from social cooperation. An injustice occurs when they are distributed according to criteria that not everyone, especially those who stand to receive less than others, could reasonably accept. Income is one of the most visible places where this question arises, since pay is one of the main ways a society hands out its benefits.
The second dimension is exclusion. Here the issue is not how resources are distributed but to whom: who counts as a legitimate recipient. Social injustice, in the text's definition, involves actions or policies undertaken to exclude others as legitimate recipients of the distribution of benefits and burdens, and this can be experienced by individuals or groups. The third dimension is disempowerment. Injustice exposes and exploits a person's vulnerabilities, and its victims are left disempowered. The text starts from the victims' experience and ties this to inequalities of power between perpetrator and victim.
The dimensions are not equal in weight. For an action or policy to count as an injustice, maldistribution must always be present. It often comes with exclusion and disempowerment, and the worst and hardest to correct injustice is the one in which all three occur together. How exactly income inequality feeds each dimension is not something the source text spells out, and this section therefore stays with the framework itself.
Who is hit hardest: intersections
Income gaps rarely fall evenly. The source text points to the lines along which they tend to run, starting with the household itself. It calls it an injustice for a parent to spend more resources, whether nutritional or educational, on sons than on daughters. In cultures and households where boys are given a greater share of family resources, such as educational opportunities or even nutritional levels, the text sees a clear case of injustice. Here a gap in who receives what inside one family is the very mechanism that turns inequality into injustice.
The same passage links this to a wider observation. Amartya Sen notes that injustice relates, often enough, to hardy social divisions, linked with divisions of class, gender, rank, location, religion, community and other established barriers. The author accepts the point, but only partly: gender inequality echoes these social divisions only because they have an impact on distributive criteria. In the last analysis, there is more to social injustice than social divisions or inequality. Class, gender and location matter because they shape who gets what, not simply because they mark a difference.
How large these gaps are for women, ethnic groups, migrants or regions is not something the source text measures, and no group-level figures are available here. What the framework offers is a way of reading them: when income disadvantage coincides with exclusion from the benefits of social cooperation, and with the disempowerment that follows, the injustice is at its most severe and hardest to correct.
Counterarguments and debate
The strongest warning against treating inequality as the root of injustice comes from the source text itself. Its author calls it tempting but unwise to emphasize inequality as the essence of injustice, and he puts the conflation down to a common error in the literature. In his view the causal chain runs through use, not size: inequalities create the conditions in which vulnerability and power arise, but an act of injustice occurs only when someone takes advantage of them.
The author also takes issue with a famous opposing position. For John Rawls, injustice is simply inequalities that are not to the benefit of all. That formula leaves room for inequality that does benefit everyone, and it is the logic behind the familiar argument that unequal rewards can act as an incentive for growth. The source text does not discuss that growth argument or weigh its evidence, and it names no economists or institutions on either side, so the argument cannot be tested here.
What the text does offer is a reason for caution on both sides. It rejects the idea that injustice is merely the absence of justice, as Rawls assumes, and holds that the opposite is closer to the truth. If that is right, the dispute over causality is not settled by measuring the gap alone. It also depends on the criteria by which benefits and burdens are distributed, and on whether those who receive less could reasonably accept them.