It turns out that the deregulation of banking had the effect of reallocating resources away from productive investment and toward speculation:

In academic and policy circles there is deep mistrust of public sector involvement in credit allocation, much more than in the credit allocation decisions made by commercial banks. This mistrust continues, despite the financial crisis of 2007–08 demonstrating the huge dangers of a deregulated credit market. Whilst, post-crisis, financial regulators have begun to develop policies aimed at reducing lending in certain sectors, calls for proactively directing finance to support desirable sectors of the economy have largely been ignored.

In a new UCL Institute for Innovation and Public Purpose (IIPP) working paper, co-authored with Dutch economists Dirk Bezemer and Lu Zhang and Frank van Lerven, we examine the theoretical, historical and empirical evidence around credit policy and its effects on the allocation of credit.

Our motivation, aside from the crisis, is the remarkable ‘debt shift’ in advanced economies over the past 40 years which has seen banks move away from their primary textbook role of lending to non-financial firms to support productive investment. Whilst total bank credit has roughly doubled relative to GDP since the early 1970s in advanced economies, the share of credit supporting firms has actually fallen, from 60% to 40%. The vast expansion in lending has been mainly to support households to buy houses and, to a lesser extent, consumer goods and the purchase of financial assets.

………

These new empirical findings support a much older body of theory that argues that credit markets, left to their own devices, will not optimise the allocation of resources. Instead, following Joseph Schumpeter’s, Keynes’ and Hyman Minsky’s arguments, they will tend to shift financial resources away from real-sector investment and innovation and towards asset markets and speculation; away from equitable income growth and towards capital gains that polarises wealth and income; and away from a robust, stable growth path and towards fragile boom-busts cycles with frequent crises.

The only people who benefit from this are the banksters, and the politicians seeking political donations.

H/t naked capitalism