This past February I wrote a post entitled Big Problems Don't Always Require Big Fixes. In a fascinating and informative TED talk Rory Sutherland has expanded upon this theme. If you have 12 minutes, I encourage you to watch the video.
If you don't have the time, the major piece of unlearning which society must embrace is the idea that the size of the input(s) used to solve problems is equal to the amount of change which will be produced. This is simply not true. As Sutherland says, "imput and change are not proportional."