Your concerns are understandable. Indeed, just a while ago economist Brad DeLong (Professor of Economics at Berkeley) himself stated that "there is no such thing as “economic theory.”" He went on saying that "(t)here is simply no set of bedrock principles on which one can base calculations that illuminate real-world economic outcomes. (...) The “economic principles” underpinning (economist's) theories are a fraud – not fundamental truths but mere knobs that are twiddled and tuned so that the “right” conclusions come out of the analysis. The “right” conclusions depend on which of two types of economist you are. One type chooses, for non-economic and non-scientific reasons, a political stance and a set of political allies, and twiddles and tunes his or her assumptions until they yield conclusions that fit their stance and please their allies. The other type takes the carcass of history, throws it into the pot, turns up the heat, and boils it down, hoping that the bones will yield lessons and suggest principles to guide our civilization’s voters, bureaucrats, and politicians as they slouch toward utopia. Not surprisingly, I believe that only the second kind of economist has anything useful to say."

Considering this statement by one of the world's most prominent economists, your opinion is understandable. However, you might be willing to give an alternative economic theory a chance, just this once. If so, please go back and click YES.