The only thing you can be sure about all this is that THEY WILL NEVER LEARN.
Leaders tend to make the same bad decisions over and over and over. There should be a book out soon by a couple of economists with the ironic title "Yes, we learned something" in which they have analyzed economic crisis from all over the world in the last 500 years.
One thing they all have in common: Nobody remembered (let alone acted accordingly) the lesson that was to be learned the next time a crisis came around.