In 1341, Mohammed bin Tughlaq suffered a heavy drain upon the treasury from his munificence in dealing with the distress caused by his decision to move the capital to Daulatabad and back again, as the new capital did not have an adequate water supply. With many perishing on the two forced marches, the sultan opened the fisc to mitigate the distress of his subjects. To meet this fiscal drain, the sultan made his famous experiment of instituting a token currency of brass and copper to replace the silver and gold coinage. But he forgot that the success of this scheme depended upon a state monopoly in issuing the token currency. The result says contemporary political thinker Ziauddin Barani “turned the house of every Hindu into a mint, and the Hindus of the various provinces coined crores and lakhs of copper coins”. Their value relative to the silver-gold old currency soon fell so low “that they were not valued more than pebbles or potsherds”. With the ensuing disruption of trade “the sultan repealed his edict, and in great wrath he proclaimed that whoever possessed copper coins should bring them to the treasury and receive the old ones in exchange…. So many of these copper tankas were brought to the treasury that heaps of them rose up in Tughlakabad like mountains.” How this run on its reserves was met is unexplained, but as the 19th century expert on Indian numismatics E Thomas pointed out “if good money was paid for every token, true or forged, the sultan’s temporary loan from his own subjects must have been repaid with more than even oriental rates of interest” (Stanley Lane-Poole: Mediaeval India, pp. 135-136). This was the first conspicuous Indian example of what Milton Friedman described in his book entitled Money Mischief.
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