And what makes you think it is the job of economists to contribute to society? Lets look at the fiat system, even a kid would be able to understand that such a system will be too unstable and benefit only those at the top, and yet economists all over the world defend the system with all what they have and they think that anyone that criticizes it does not know what they are talking about, so in my opinion the evidence is very clear, economists exist to help those at the top to take advantage of everyone else, and when you think about them in this way then you can see they are doing a good job.