Most sciences conduct experiments and the results of those experiments form the foundation of scientific belief. Economics conducts experiments, yet few economists believe the results.
Example: The Reagan administration began the largest federal debt increase in American history. The result: America moved from the high inflation and economic "malaise" of the Carter administration, to low inflation and fast economic growth.
Yet, most economists ignore this experiment, and continue to preach debt reduction. In a sense, economics has become a religion, where the status of the preacher is more important than scientific fact.