You have to question why is falsifiability, prediction, and verification the basic criterion, here? Do we ask for whether the Pythagorean Theorem can be falsified, or should we have to conduct empirical testing of 2+2=4, and ask ourselves what future events we can predict with it? First, we have to mention that there are different methodologies to be applied to the social sciences and the physical sciences. The reason for this is, at root, the fact of human volition and the impossibility of subjecting economic data to controlled experimentation. Second, we can mention that the Popperian criterion (hey that rhymes) of falsifiability is not, in Objectivist epistemology, a basic criterion for truth anyway: evidence and proof are.
We have to understand the Austrian school’s praxeological methodology, which differs substantially from the logical positivism of mainstream economics. Their method is not about collecting an arrangement of statistical facts and looking for empirical trends, but rather it is rooted in the nature of man and of the fact of our goal-directed behavior. Starting from the undeniable truth that man acts and uses means to achieve ends, economics draws out logically all of the facts contained within that statement. To the Austrians, economics is a logical science based on observation of man’s nature and deduction based thereupon, not mathematical or statistical. So this means that, unlike the physical sciences, the data of economics are not tentative hypotheses which, or the inferences from which, must be tested and verified by experimentation. On the contrary, economic conclusions are rigorous deductions from undeniable facts, and thus are necessarily true. Each step of the logical chain rests on necessarily true propositions and so give us facts about the real world (e.g. like the Pythagorean Theorem, or 2+2=4), and therefore are not subject to verification and falsifiable the way the physical sciences are. If we did come up with a false conclusion, it would simply mean there was either an error in your reasoning, or that one of the premises you used in the proof was lacking.
Positivist economics, on the other hand, can know a great deal of facts about particular instances, but without a knowledge of their necessary causal interrelations, are often misled to false conclusions, thus say the Austrians.
The issue of prediction is also very important for mainstream economics, it is basically the whole point of economics in their eyes. Even though the Austrians have been http://www.youtube.com/watch?v=MnekzRuu8wo, they don’t view prediction has the essential basis of economics, rather it is the science of exchanges.
You can find much writing about this in the Austrian literature, as well as their criticisms of logical positivism and mathematical economics.