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Today the knowledge share of the GDP has never been higher yet we don't see the trend of the decreasing importance of finance you are prognosticating because of the rising importance of knowledge.
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Since several decades the bulk of the value added is produced by medium and small size companies, which don't need high fixed capital investment, which are hiring an increasing number of knowledge workers and which happen to have financial needs.
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This is a fair challenge. TPTB often argues that his predicted future is happening now with the implication that we will see its fruition in our lifetimes.
I tend to think that he is right in that he has identified a ongoing trend but that it is happening much more slowly then the time-frame implied in some of his writings.
Finance is obviously not going to vanish going forward. Similarly the majority of knowledge workers are going to continue working for a salary for the foreseeable future. However, the pertinent question is will the relative value of financing decline as knowledge production becomes an ever larger share of the economy?
I think he makes a case why this may be so mainly:
1) The value of hard resource production declines progressively over time with technological progress.
2) Improving production requires knowledge production .
3) Knowledge production increasingly cannot be entirely financed.
So how do we square that with the fact that financing is obviously not decreasing across the larger economy at present?
This could be accounted for by three possible explanations:
A) The thesis is incorrect
B) Financing is declining in relative importance but its decline is masked via debasement of the currency unit.
C) We are in a transient period of atypical financing (a bubble) that will eventually resolve itself and results is atypically high levels of financing.
I tend to think the answer is a combination of B and C. That the value of financing is declining gradually over time, and that this decline is masked by a massive burst of financing as policy makers are forced to react to the end of our current monetary order via competitive global rounds of QE and debasement.