Profiting from the Wage Gap

How profitable was colonial mining in central Africa? And how much of that profitability depended on the systematic suppression of African wages? These are the questions at the heart of my paper “Profiting from the Wage Gap,” forthcoming in Accounting History, which reconstructs the financial performance of Roan Antelope Copper Mines Ltd (RACM) in Northern Rhodesia between 1931 and 1939.

The answer, in short, is that the mine was extraordinarily profitable—and that roughly half of its exceptional shareholder returns were derived from institutionalised racial wage inequality.

An extraordinary enterprise

In mid-1927, Roan Antelope was a collection of thatched huts around drilling sites. By March 1931, its headgear surpassed the tallest structures on the South African Rand. The speed of development was remarkable, and so was the financial performance that followed. Even in its first full year of production, during the depths of the Great Depression, RACM achieved gross profit margins of 19 per cent. By 1937/38, return on capital employed exceeded 40 per cent, operating margins topped 50 per cent, and the company had accumulated £1.8 million in cash while eliminating all its debenture debt.

These are exceptional numbers by any standard. They were made possible by a convergence of factors: rich copper deposits already proven by neighbouring operations in the Belgian Congo, imperial infrastructure including the Rhodesian railway network, favourable licensing terms from the British South Africa Company, and—crucially—a racialised labour system that kept the cost of the predominantly African workforce at a fraction of what it might otherwise have been.

The wage gap in numbers

The scale of the wage disparity is difficult to overstate. At Roan Antelope in 1940, African miners received between 0.83 and 1.13 shillings per daily shift—between 4 and 6 per cent of the wage paid to the lowest-paid European worker. The company was overwhelmingly dependent on African labour, which outnumbered European workers by ratios of between six and ten to one. Yet the company invested £760 per white worker in housing and facilities against just £29 per African worker—a ratio of nearly 26 to 1, despite African workers comprising 85 per cent of the workforce.

These figures give empirical precision to what historians of the Copperbelt have long described in qualitative terms. They also undermine the paternalistic narratives that the company itself promoted. In its commissioned history, Copper Venture, RACM presented its operations as a civilising force that transformed “undernourished weaklings” into “fine muscular fellows.” The balance sheet tells a rather different story about whose interests were really being served.

What if the strikers had won?

In 1940, African workers at the neighbouring Mufulira mine went on strike demanding 10 shillings per day—roughly fourteen times their actual wage, but still only half the minimum European rate. One of the paper’s contributions is a counterfactual analysis that asks: what would have happened to RACM’s profitability if those demands had been met?

The results are striking. Under the 10-shilling scenario, RACM would have remained profitable in every year except its first, when construction costs were at their peak. In 1937, the company’s actual return on capital employed was 34.78 per cent; under equitable wages, it would still have been 17.69 per cent—a highly respectable return by any standard. The racial wage structure was not an economic necessity. It was a strategic choice that approximately doubled shareholder returns at the direct expense of African workers.

Accounting as imperial infrastructure

What makes this case particularly interesting from an accounting history perspective is how the company’s financial reporting both documented and reinforced colonial hierarchies. The balance sheet meticulously segregated European and African facilities into separate asset categories—“Township” for white workers, “Native Compound and Hospital” for Africans. This was not an accounting necessity; comparable copper enterprises elsewhere, notably in Chile, did not maintain such distinctions. The segregated categories made racial inequality auditable, trackable, and—crucially—normal. They transformed what might have been recognised as problematic disparity into routine line items.

Building on Miller and O’Leary’s work on accounting as a mode of socio-political management, the paper argues that these categorisations helped construct African workers as what they would call “governable persons”—rendered calculable and controllable through accounting classification. The balance sheet did not merely reflect colonial attitudes; it actively helped constitute them through differential resource allocation formalised in financial reporting.

Social washing, circa 1930

The contrast between the financial reality documented in RACM’s accounts and the narrative presented in its corporate communications amounts to what the paper identifies as an early form of “social washing”—analogous to contemporary greenwashing. Copper Venture catalogued the extensive luxuries provided to European workers—golf courses with grass greens, swimming pools, modern cinemas—then immediately reframed the stark contrast in treatment as benevolent development for African workers. The company claimed that mine employment improved living conditions in tribal areas more effectively than all the efforts of colonial district officers.

The accounting records tell a different story. A mere £149,784 was allocated for all African facilities compared with £651,635 for European amenities. The sophistication of this dual narrative strategy—financial transparency to attract metropolitan investment, paternalistic rhetoric to justify inequality—suggests that techniques for managing social legitimacy while maximising extraction were already well-established corporate practices by the 1930s.

Why it matters now

The patterns documented in this study are not merely historical curiosities. Multinational corporations operating in resource-rich African nations continue to employ accounting practices to manage stakeholder perceptions while extracting disproportionate value from local resources. The reframing of exploitation as development—the central rhetorical strategy of Copper Venture—remains a recognisable feature of corporate social responsibility discourse in the extractive sector. What has changed is the vocabulary; the underlying dynamic has proved remarkably durable.

The paper’s counterfactual methodology also offers a template for contemporary analysis. If management accounting techniques can reveal that colonial wage disparities were strategic choices rather than economic necessities, the same approach can be applied to modern extractive industries to test whether current wage structures reflect market forces or inherited power asymmetries.