"Those who wish to blame greed for the crisis need to explain
how and why it is that greed seems to causes crises only at
specific times, despite the fact that it is omnipresent as a
feature of human nature and market economies. As the
economist Larry White has noted, if we saw a bunch of planes
crash all on the same day, we wouldn't blame gravity. It's always
there. Something else
must be at work."