>>....
>>And yet their theories are put into practice.
>
>What only shows how stable the system is. Even errors in modeling (what results into faulty controler / sensor, see control theory) will not do much to it.
>We have not seen a real problem yet. (In the sense that the majority of population lost believe in the computer numbers / printed fabric we use to transfer values.)

We don't really know whether what we perceive as a problem really is a fault in the theory, or part of it :). I mostly mean the economics, and the big failures of sociology (the latter being even worse at predicting). Are the bubbles failures or part of the system?

Remember the oil crisis 1974? The german (west) economists were predicting large fall of retail, seeing in advance how Germans will drop the luxury, travel less, even that the sales of beer will fall. None of which have happened to any serious extent, because the practical people ditched the church tax first and found that that was enough of a saving (hey, I said "a saving", not "a savings" - if you hear I was assassinated, this is why). Why didn't any of economists predict that, if it was so obvious to the statistical majority of people?