Malabar's order was elaborate even by the standards of the subcontinent, and observers of every persuasion remarked on its severity. Nambudiri Brahmin janmis held the land. The Nairs were the armed, landholding service caste beneath them — the militia, the stewards, the local power, and, in de La Tour's phrase, the first caste after the Brahmins. Tiyyas and Ezhavas worked below that. Pulayas and Parayas were held in untouchability so strict that it was measured in paces: distance-pollution rules fixed how close a person of each caste could come to a person of another before the higher was defiled.
The Nairs were also the reason Malabar could not be held. They were the province's fighting class; they resisted for twenty-six years; they allied with Travancore and then with the East India Company. Disarming them was the central military problem of the occupation, and the edict solves it directly — not by confiscation, which requires troops in every village, but by licensing everyone else to do the confiscating.
This is what decides how to read the measure. The caste Haidar Ali demoted was selected for him by the war. Where a caste elite was not fighting Mysore, Mysore left it alone: in the Kannada heartland the temples kept their grants, the revenue service stayed heavily Brahmin-staffed, and Purnaiya, a Brahmin, ran the administration until the end of the state. A ruler at war with caste does not keep that arrangement at home for forty years — and does not leave the Nambudiris at the top of the province he is said to have liberated.