Similar to the "climbing=white person's sport" thread, I have noticed that almost all of the climbers I encounter are middle-class. There are exceptions, as I have climbed with some more wealthy people and I have a friend I climb with who is fairly poor, but for the most part, climbers seem to be middle-class.
It seems this has fluctuated throughout time. When mountaineering became popular in the mid-1800's, it was all for very wealthy people. In the 1950's, many of the pioneering climbers seemed to be very poor. Now, it seems I hardly see anyone who isn't right in the middle class.
Any ideas?
-Mark