What did they propose? Together, these represent sweeping changes. (ABOVE) In practice, however, it hasn’t always worked out the way it was supposed to. Indeed, few of the changes proposed had been tested on the ground first and proven to work. The economists, unfortunately, had not taken a lesson from the health field that one needs to pilot test before upscaling, that one needs to provide evidence that something works before subjecting practically the entire global population to it.