Shareholder primacy ideology drove the rise in inequality

The claim

Since Milton Friedman’s 1970 New York Times Magazine essay declared that the social responsibility of business is to increase profits for its shareholders, American corporations have progressively restructured their internal incentives, executive compensation, and capital allocation toward that singular goal. The result — intentional or not — was a decades-long transfer of income from workers to shareholders and the executives whose compensation was tied to share prices. Inequality rose not because workers became less productive or less deserving, but because the institutional rules governing how corporate surplus is distributed changed.

The mechanism

The classical firm of the postwar era operated under an implicit stakeholder compact: managers balanced the interests of shareholders, workers, customers, and communities. Executive pay was modest relative to worker pay (roughly 20:1 in the 1960s). Retained earnings funded R&D, capital investment, and wage increases. Stock buybacks were legally constrained as potential market manipulation.

Three institutional shifts broke this compact:

The Friedman doctrine and Business Roundtable alignment. Friedman’s 1970 essay provided ideological cover; the academic framework was formalized by Jensen and Meckling (1976), who reframed the firm as a nexus of contracts in which managers were agents of shareholders. Business schools adopted this framework rapidly. By the 1980s, it had become the operating assumption of most large US corporate boards. The Business Roundtable’s 1997 statement — “the principal obligation of management and directors is to the corporation’s shareowners” — marked the ideological consolidation.

Rule 10b-18 and the buyback explosion. The SEC’s 1982 adoption of Rule 10b-18 created a safe harbor for open-market repurchases, effectively legalizing buybacks at scale. Prior to 1982, buybacks were rare: the legal risk of market manipulation deterred most boards. After 1982, buybacks grew steadily; after the 1990s equity-compensation boom tied CEO pay to stock price, the incentive to boost EPS through repurchases rather than investment became structural. By the 2010s, S&P 500 companies were returning more capital through buybacks than through dividends.

Executive compensation restructuring. The 1993 federal cap on tax-deductible executive cash compensation (over $1 million) was meant to restrain CEO pay. Its effect was the opposite: boards shifted to stock options and equity grants, directly aligning executive wealth with share price rather than long-term firm performance or workforce outcomes. Jensen and Murphy (1990) had explicitly called for this realignment. The result: CEO-to-worker pay ratios expanded from roughly 21:1 in 1965 to 351:1 by 2020.

The income redistribution that followed is not merely correlational. Lazonick and O’Sullivan (2000) document the “downsize and distribute” transition: firms moved from retaining and reinvesting earnings to downsizing workforces and distributing to shareholders. Bivens and Mishel (2015) show that the labor share decline accounts for a substantial fraction of the increase in wage inequality, distinct from skill-biased technological change explanations. The mechanism runs: shareholder primacy ideology → executive incentives aligned with share price → buybacks and dividends preferred over wage increases → labor share falls → income accrues to capital owners → inequality rises.

The evidence

Labor share decline. The BLS Major Sector Productivity and Costs series shows US labor’s share of business-sector income declining from roughly 65% in 1970 to 56.7% in 2014 — a drop of approximately 8 percentage points over four decades. This is not a measurement artifact: the decline persists across alternative measures (Elsby, Hobijn, and Sahin 2013; Karabarbounis and Neiman 2014). Critically, productivity continued to rise through this period; the gap between productivity growth and median compensation widened continuously from the mid-1970s onward (EPI State of Working America data series).

The buyback mechanism at scale. Lazonick (2014) documents that from 2003 to 2012, the 449 S&P 500 companies that were publicly listed throughout the period spent $2.4 trillion on buybacks (54% of earnings) and $2.3 trillion on dividends (37% of earnings), leaving only 9% for investment and wages. In the following decade (2010–2019), S&P 500 buybacks alone exceeded $5 trillion. This is not capital being deployed productively; it is capital being transferred to shareholders. The companies executing the largest buybacks over this period — Apple, Microsoft, ExxonMobil, IBM — showed wage growth significantly below their revenue and profit growth.

CEO pay and equity-linked compensation. The EPI’s biennial CEO compensation series (Mishel and Kandra 2021) shows the 21:1 ratio of 1965 expanding to 61:1 by 1989, 383:1 at the 2000 peak, contracting to 195:1 after the dot-com crash, and recovering to 351:1 by 2020. The bulk of this increase is equity compensation. This is not compensation for scarce talent — the ratio is uniquely American among peer nations.

Private equity and wage suppression. The shareholder-primacy logic is applied in its most concentrated form by private equity. Agrawal and Tambe (2016) and Hsu, Lim, and Novak (2017) document wage and employment effects at private equity-acquired firms. The Roosevelt Institute (2019) survey of the literature finds consistent evidence of wage reduction post-buyout, particularly in leveraged buyouts financed with debt service that crowds out payroll flexibility.

The wage productivity gap. From 1979 to 2020, net productivity rose 61.8% while median hourly compensation of production and nonsupervisory workers rose 17.5% (EPI, 2021). The divergence tracks the period of shareholder primacy consolidation. The gap is not explained by changing skill composition — it persists within educational and occupational categories.

Who benefits

The primary beneficiaries are those with high concentrations of financial wealth. The top 1% of US households owned approximately 54% of corporate equity by value in 2022 (Federal Reserve Distributional Financial Accounts); the top 10% owned about 93%. Buybacks and dividends funded by forgone wage growth transfer income from workers to this narrow ownership stratum.

Within corporations, executives compensated with equity options directly benefit from actions — buybacks — that mechanically raise earnings per share and thus stock prices. The alignment is explicit and acknowledged in the academic literature that justified it.

The financial services sector benefits broadly: higher asset prices increase assets under management, fee revenue, and transaction volumes. BlackRock, Vanguard, and State Street — as the dominant institutional shareholders — have historically prioritized earnings-per-share growth when engaging with portfolio company management. The Business Roundtable’s 2019 statement nominally retreating from pure shareholder primacy has not, as of 2024, been accompanied by measurable changes in capital allocation behavior at member firms.

Think tanks propagating shareholder primacy as intellectual framework — the American Enterprise Institute, the Manhattan Institute, portions of the Cato Institute — receive funding from financial sector donors and large corporate foundations. The academic infrastructure built around Jensen-Meckling agency theory is embedded in law schools and business schools, producing lawyers and executives trained in its assumptions.

The counter

The shareholder primacy account, while well-supported, competes with two serious alternative explanations for the labor share decline that deserve honest engagement.

Technology and globalization. Karabarbounis and Neiman (2014) attribute a substantial portion of the global labor share decline to falling prices of investment goods — digitization and automation making capital cheaper relative to labor. Autor, Dorn, and Hanson (2013) document the wage-depressing effects of import competition from China on US manufacturing workers. These forces operate across countries regardless of governance model and present a genuine complication: the labor share fell in Germany and Japan too, just less.

Superstar firm concentration. Autor et al. (2020) argue that the rise of winner-take-most dynamics in digitally intensive industries, rather than shareholder ideology per se, explains much of the labor share decline. High-productivity superstar firms have lower labor shares by construction (more value captured per worker), and their growing market share mechanically pulls the aggregate labor share down.

The strongest version of the structural critique is not that shareholder primacy is the exclusive cause but that it is a force multiplier: when firms are governed to prioritize shareholder returns, the distributional response to technological change and competitive pressure is to extract the gains as profit rather than share them with workers. Germany faced the same China shock and the same technology diffusion; the difference in distributional outcomes is plausibly explained by co-determination governance, strong sectoral bargaining, and retained stakeholder norms.

The evidence is also stronger on the mechanism than on precise magnitudes. Isolating the shareholder primacy contribution from correlated deregulation, union decline, and technological change is an ongoing empirical project. The claim that the ideology drove inequality is well-supported; the claim that it is the dominant driver requires more precise identification than current evidence provides.

References

Autor, D., Dorn, D., & Hanson, G. H. (2013). The China syndrome: Local labor market effects of import competition in the United States. American Economic Review, 103(6), 2121–2168. https://doi.org/10.1257/aer.103.6.2121

Autor, D., Dorn, D., Katz, L. F., Patterson, C., & Van Reenen, J. (2020). The fall of the labor share and the rise of superstar firms. Quarterly Journal of Economics, 135(2), 645–709. https://doi.org/10.1093/qje/qjaa004

Bivens, J., & Mishel, L. (2015). Understanding the historic divergence between productivity and a typical worker’s pay: Why it matters and why it’s real. Economic Policy Institute Briefing Paper #406. https://www.epi.org/publication/understanding-the-historic-divergence-between-productivity-and-a-typical-workers-pay/

Elsby, M. W. L., Hobijn, B., & Sahin, A. (2013). The decline of the U.S. labor share. Brookings Papers on Economic Activity, Fall 2013, 1–63. https://doi.org/10.1353/eca.2013.0016

Friedman, M. (1970, September 13). A Friedman doctrine: The social responsibility of business is to increase its profits. New York Times Magazine.

Jensen, M. C., & Meckling, W. H. (1976). Theory of the firm: Managerial behavior, agency costs and ownership structure. Journal of Financial Economics, 3(4), 305–360. https://doi.org/10.1016/0304-405X(76)90026-X

Karabarbounis, L., & Neiman, B. (2014). The global decline of the labor share. Quarterly Journal of Economics, 129(1), 61–103. https://doi.org/10.1093/qje/qjt032

Lazonick, W. (2014). Profits without prosperity. Harvard Business Review, September 2014. https://hbr.org/2014/09/profits-without-prosperity

Lazonick, W., & O’Sullivan, M. (2000). Maximizing shareholder value: A new ideology for corporate governance. Economy and Society, 29(1), 13–35. https://doi.org/10.1080/030851400360541

Mishel, L., & Kandra, J. (2021). CEO pay has skyrocketed 1,322% since 1978: CEO pay grew 60 times faster than typical worker pay over the last four decades. Economic Policy Institute. https://www.epi.org/publication/ceo-pay-in-2020/