Economists have focused too much on the economy's circulatory system and have neglected to study its digestive tract. Throughput growth means pushing more of the same food through an ever larger digestive tract; development means eating better food and digesting it more thoroughly.

Herman E. Daly (2008), as cited in: Ian Jenkins, Roland Schröder (2013). Sustainability in Tourism: A Multidisciplinary Approach. p. 143