It's only possible to squeeze GDP growth out of an economy with stationary or declining labour productivity by increasing the hours spent working there. Either more people must work or else each of them must work longer hours. Neither of these things is consistent with the promise that capitalism held out to us. Once labour productivity goes into reverse, in fact, we are already to all intents and purposes living in a postgrowth world. Figuring out how to survive -- let alone flourish -- under these circumstances is no longer trivial.

— Post Growth by Tim Jackson (Page 19)