"The Cobra Effect"

The British government was concerned about the number of venomous cobra snakes in Delhi.

The government therefore offered a bounty for every dead cobra. Initially this was a successful strategy as large numbers of snakes were killed for the reward.

Eventually, however, enterprising people began to breed cobras for the income.



@fribbledom Terry Pratchett, when describing the same effect but with rats, offered a simple one-phrase solution uttered by one Lord Vetinary, "Tax the rat farms".

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