The Cobra Effect is when you're trying to make there be fewer of things (cobras) but the incentives you set up actually lead to there being more of them (it's n

The Cobra Effect is when you're trying to make there be fewer of things (cobras) but the incentives you set up actually lead to there being more of them (it's now worth it for people to be cobra breeders). Perhaps you're thinking of Goodheart's law? https://en.wikipedia.org/wiki/Goodhart%27s_law https://en.wikipedia.org/wiki/Goodhart%27s_law