http://nuclearchange.i2p/praxis/thread/123.html
Part of it is frugal or miserly instinct, another is fear of an expensive accident, but it's also from a sense of comfort and content in simple daily living, and a revulsion towards the arrogant waste of decadence.
(As a side note, if the more anarchic school of ideas interest you, I recommend having a look at the 3-Sided Football thread.