Almost six years ago, before I took to taxi driving, I spent almost two months as a "seasonal associate" at an Amazon warehouse in Phoenix. It was such a relief to get laid off... In the warehouses, people are servants to the machine, and are entirely replaceable.
"Humanity's Second-Best Hope" was based on my experiences at Amazon: http://www.taxiwars.org/p/humanitys-second-best-hope.html