I remember a certain time in my country when economic and financial bodies were stressing that we were heading into a recession at this rate, no nobody listened. The people in government just kept on with their daily lives as if nothing would happen. IMF even made warnings. They told the central bank many times to take caution but nobody listened till we went into recession.
So how do these economists stop economic meltdown when people don't listen to them or take them seriously?
Some climatologists have been singing about climate change for a long time but nobody takes them seriously. Would you blame them for the natural disasters and hazards we face because they refused to listen?
Another thing is Economics is not a pure science. The theories don't give the same result everywhere at all times.
Chorine turns litmus paper white anywhere, but an economic theory needs certain factors to give certain results.
An economic or financial theory or system that worked in an Urban area might not work in a rural area.
Why did this person learned it so much if we are not going to care about them anyway. It makes no sense that the people in power are not the people who have the information that we need, and the ones who have the information that can make our world better, are not the ones who are in power. This causes the ones who have the power, to ignore the ones who can make the nation better and causes the nations to get worse.