That's an interesting point to the attachment of not having things. I might have been on that path until a previous girlfriend brought me back towards balance in the other direction. She convinced me to buy a couch and replace my plastic deck chairs. :)
I was thinking more along the lines of how people act differently with stuff. A personal example would be my dslr camera. I purposely bought the least expensive that I could get away with, but still have the basic features I wanted (used nikon d60 if you're curious). I take it everywhere and use it all the time because I don't worry about it getting broken or banged up. Obviously I'm not going to toss my camera out the window, but I'm also not going to go nuts if bangs on a rock while I'm hiking. Things are just things.
Contrast this with a friend of mine who bought a d3 (~$10k!) and a bunch of lenses that go for over $2k. He rarely ever uses the camera. It's like he's afraid to mess it up. In my mind his camera is owning him rather than him owning a camera.