What do you think about economists, who study the theories of economics and brag about being vast in the study of economics, yet doesn't help or contribute sufyficiently to control or stop world economic meltdown?
No, they can't just fix the economy by knowing how to fix it, they don't have the power and resources. Fixing a macro economic problem required huge political power and resources, even in a scale of a country, let alone a global economy. Just like all those scientist, both Economist and Scientist can only make a suggestion and expert analysis on the matter, they still need to push government and people who has the political power to actually execute a possible solution.