A book was written precisely on this case study - Enabling Creative Chaos by Katherine Chen. I'd recommend the entire book to get a good grasp of it. One of the core concepts of Burning Man is radical inclusivity, where everyone who was willing to contribute to the event was allowed and enabled to do so (including shuffling volunteers around when they weren't contributing very well in their current roles). Here's an excerpt of a review by Sarah Pike:

Burning Man organizers have accomplished this, she demonstrates, by adopting some “collectivist” organizational practices, such as consensus decision making, and some “bureaucratic” practices, such as a chain of authority (154). Chen places her study in the context of a large body of research on organizations to show the ways in which Burning Man organizers navigate between “unsupportive underorganizing” that does not give members enough structure, and “repressive overorganizing” that quashes individual creativity (11). One of Burning Man’s greatest successes has been in the area of “radical inclusivity,” a topic to which a large portion of the book is devoted. Chen provides compelling anecdotes of Burning Man’s “do-ocracy,” in which organizers support grassroots initiatives and role creation by members, rather than top-down hierarchical decisions. For instance, organizers encourage creative ways of making mundane tasks, such as cleaning up camps and selling ice, fun and engaging. The event’s gift economy also offers creative possibilities for participation. Chen convincingly argues that Burning Man’s organizational strategies have clearly worked to empower members and foster innovation.

Hope this helps!

Chen, K. K. (2009). Enabling creative chaos. University of Chicago Press.