Ambedkar argued caste divides labourers themselves, not just labour

Evidence

To Indian communists, who treated caste as a sort of folk dialect derived from the classical language of class analysis, rather than as a unique, fully developed language of its own, Ambedkar said, “[T]he caste system is not merely a division of labour. It is also a division of labourers.” — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 353

Categorization

• DEFINE: The famous dictum distinguishing synthetic caste from analytic class — a key definitional milestone for the caste-vs-class debate.