Hyman Minsky argued exactly that for a long time, and he's only recently been taken seriously: http://www.boston.com/bostonglobe/ideas/articles/2009/09/13/why_

Hyman Minsky argued exactly that for a long time, and he's only recently been taken seriously: http://www.boston.com/bostonglobe/ideas/articles/2009/09/13/why_capitalism_fails/ http://www.boston.com/bostonglobe/ideas/articles/2009/09/13/...