Before we can answer these questions properly, we need to introduce the other key components of the financial system: the bond market, the stock market, the insurance market, the real estate market and the extraordinary globalization of all these markets that has taken place over the past twenty years. The root cause, however, must lie in the evolution of money and the banks whose liabilities are its key component. The inescapable reality seems to be that breaking the link between money creation and a metallic anchor has led to an unprecedented monetary expansion - and with it a credit boom the like of which the world has never seen. Measuring liquidity as the ratio of broad money to output* over the past hundred years, it is very clear that the trend since the 1970s has been for that ratio to rise - in the case of broad money in the major developed economies from around 70 per cent before the closing of the gold window to more than 100 per cent by 2005.
(NB* A ratio known to economists as Marshallian k after the economist Alfred Marshall. Strictly speaking, k is the ratio of the monetary base to nominal GDP.)In the eurozone, the increase has been especially steep, from just over 60 per cent as recently as 1990 to just under 90 per cent today. At the same time, the capital adequacy of banks in the developed world has been slowly but steadily declining. In Europe bank capital is now equivalent to less than 10 per cent of assets, compared with around 25 per cent at the beginning of the twentieth century. In other words, banks are not only taking in more deposits; they are lending out a greater proportion of them, and minimizing their capital base.

