The meat-eater problem (sometimes called the poor meat-eater problem) is the concern that some interventions aimed at helping humans might increase animal product consumption and as a result increase farmed animal suffering, e.g. by increasing real income or human population.
The meat-eater problem appears to have been first explicitly described in a Felicifia post from 2009.
Saving human lives, and making humans more prosperous, seem to be obviously good in terms of direct effects. However, humans consume animal products, and these animal products may cause considerable animal suffering. Therefore, improving human lives may lead to negative effects that outweigh the direct positive effects. This “meat-eater problem” suggests that working on global poverty may be less effective than is commonly assumed.
Although it is very difficult to quantify these effects, one estimate suggests that each additional $1,000 per year for a relatively poor individual may cause between 1 and 190 days of animal suffering, though the estimate should not be taken literally. Some have argued that the problem is less significant by claiming that animals have net positive lives, or by arguing that the effect on consumption is relatively small....