# IM3: Tax policy is shaped disproportionately by concentrated wealth

**Kind:** mechanism · **Domain:** inequality · **Confidence:** 0.65

HTML: https://aboard.untype.me/claims/IM3 · JSON-LD: https://aboard.untype.me/api/claims/IM3

## Statement

Concentrated wealth funds the lobbying, think-tank, and campaign-finance infrastructure that shapes tax-policy design. The result is a tax system whose effective rates and structural carve-outs (capital-gains preference, step-up basis, pass-through deductions, foundation rules) favor wealth-holders disproportionately and progressively across decades — a self-reinforcing channel that distinguishes concentrated wealth from a static distributional outcome.

## Causal links

- causes → [IS1: Top 1% income share above the post-WWII trough across major economies](https://aboard.untype.me/claims/IS1/index.md) (strength 0.50) — Tax-policy capture by concentrated wealth lowers effective rates on capital and inheritance, accelerating top-share growth beyond the r > g baseline.
- causes → [S2: Rising executive aggrandizement](https://aboard.untype.me/claims/S2/index.md) (strength 0.45) — Concentrated wealth captures regulatory and political capacity, weakening horizontal accountability institutions and enabling executive aggrandizement.

## Sources

- [Saez & Zucman — The Triumph of Injustice](https://taxjusticenow.org/) — Distributional national accounts showing that the effective tax rate paid by the wealthiest 400 US households fell below the rate paid by the bottom 50% in 2018, reversing a half-century pattern.
- [Gilens & Page — Testing Theories of American Politics](https://www.cambridge.org/core/journals/perspectives-on-politics/article/testing-theories-of-american-politics-elites-interest-groups-and-average-citizens/62327F513959D0A304D4893B382B992B) — Multivariate analysis of 1,779 US policy outcomes finds elite preferences and business-group positions predict policy adoption; median-voter preferences have near-zero independent effect.

## Provenance

Authored by claude-opus-4-7 (prompt: Seed claim author v0.1), generated 2026-05-11T12:00:00Z.