Inequality Politics & Policy

Progressive taxation, transfers, labour policy, predistribution — the four responses to post-1980 inequality. Occupy, Brexit, Trumpism read as the political consequences.

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The brief

Inequality is the central political-economy question of the post-2008 period. It is measured by tools now common in ordinary debate: the Gini coefficient, which compresses a distribution into one number between zero and one, and the top-1% income share, whose climb since 1980 is the headline statistic — though income and wealth inequality move differently, and the wealth gap is wider. The Occupy movement (2011), Brexit (2016), Trumpism (2016 and 2024), the French gilets jaunes protests (2018), and the broader populist surge across advanced economies have all been read by serious analysts as political consequences of the post-1980 inequality rise. The causal direction is contested — populism may also reflect immigration, cultural change, the decline of trust in institutions — but the correlation between rising inequality and rising populism is robust enough that taking it seriously has become mainstream. The political class did not see this coming; the inequality data was visible for two decades before the politics caught up.

Before the politics come the causes, and economists disagree about their weighting. Four candidates recur: skill-biased technological change, which raises the premium on education; globalization and trade, which exposed advanced-economy workers to low-wage competition; the decline of organized labour's bargaining power, as union density fell and firms grew more concentrated; and Thomas Piketty's claim that whenever the return on capital exceeds the growth rate — his r > g — inherited wealth tends to pull ahead of earned income, so that the share going to owners rises across generations unless something interrupts it. How much weight each driver carries is itself contested, and the answer points toward different remedies. Policy responses then fall into four broad families. Progressive taxation targets the post-tax distribution: Piketty's proposal for a global wealth tax; Saez and Zucman's specific US proposals; the international agreement on a 15% global minimum corporate tax (2021); estate and capital-gains tax reform. Transfer programmes deliver income directly to lower-income households: the US expanded child tax credit of the 2021 American Rescue Plan halved child poverty for the year it was in force, and was allowed to expire; universal basic income proposals; the European welfare states' more comprehensive systems. Labour-market policy changes pre-tax distribution by reshaping how wages are set: sectoral bargaining, minimum-wage increases, antitrust action against monopsonistic labour markets. Predistribution — a term coined by Jacob Hacker — changes the deeper rules so the pre-tax distribution is less unequal: competition policy, education access, housing supply, the structure of corporate ownership. Each lever trades off against others — higher taxes against growth, minimum wages against employment, transfers against work incentives — and each is contested. Underlying all of it is a further distinction, between inequality of outcome and inequality of opportunity: a society may tolerate large gaps if mobility is high, but mobility has itself fallen where outcomes have diverged.

Why nowInequality is, finally, as much a political question as an economic one — who is taxed, who is protected, whose grievances are heard and whose are dismissed as envy. The distributional impacts of climate policy and AI are now central to it. Who bears the cost of decarbonization — through carbon prices that fall heavier on lower-income households, or through transition support that arrives unevenly — has become a defining political fight in every country attempting net-zero. Who captures the AI productivity gains — labour or capital, frontier-lab shareholders or downstream workers, the US and China or the rest — will be one of the largest distributional questions of the coming decade. The Piketty correction — that distribution matters as much as efficiency — is now part of the mainstream of economics, even where the policy conclusions remain contested. The next round of the argument is about how to act on it.