"CAPITATION-TAX is not imposed upon slaves, Mokátibs, Modabbirs, or Am-Walids, because capitation-tax is a substitute for destruction, with respect to them, and; with respect to us, it is substitute for aid [in the wars of the faith;] now in conformity with the first of these, it would, it would follo that capitation-taxt is due; a doubt therefore arises with respec to its being due; and as this is the case, it is determined not to be incumbent upon them: neither is it incumbent upon their owner to pay capitation-taxt for them, because he himself by their means pays an increased capitation-tax, as he through them becomes rich, or obtains a mediocrity of circumstances; and in either case he pays capitation-tax in a degree superior to the labouring poor."
January 1, 1970
https://en.wikiquote.org/wiki/Burhan_al-Din_al-Marghinani