If Keynesian spending is a form of Ponzi scheme, then it only works if the bottom of the pyramid keeps getting bigger - more and more people must be sucked into the scheme. But this typical rule of the Ponzi scheme doesn't necessarily apply as strictly to the game if it is set up by a government.
Even as the base of the pyramid stops growing and the pyramid actually begins to invert itself, the government can keep the scheme going much longer than a typical Ponzi; because the government has tools that most schemers don't: the government can print money and stimulate leverage/debt in the financial system. One could think of it as a Ponzi scheme with a counterfeiter running it - in theory it could go on forever, or at least until someone realizes he's getting paid with funny money. And eventually, someone realizes it.
It's interesting to see Bill Gross at PIMCO start to talk about this. He mostly talks about the shrinking base of the pyramid, but it's not a very big jump to add the other dimension.
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Quoted from Bill Gross at PIMCO...
That return journey will be all the more difficult to accomplish, however, because of demographics, an influence that much like gravity is hard to see but whose effect is all too powerful. Demographics – or in this case population growth – is so long term in its influence that economists and observers are inclined to explain the functioning of economic society without ever factoring in the essential part that it plays in growth. Production depends upon people, not only in the actual process, but because of the final demand that justifies its existence. The more and more consumers, the more and more need for things to be produced. I will go so far as to say that not only growth but capitalism itself may be in part dependent on a growing population. Our modern era of capitalism over the past several centuries has never known a period of time in which population declined or grew less than 1% a year. Currently, the globe is adding over 77 million people a year at a pace of 1.15% annually, but slowing. Still, that’s 77 million more mouths to feed, 77 million more pairs of shoes to make, 77 million more little economic units of demand – houses, furniture, cars, roads, oil – more, more, more. Capitalism, I would assert, thrives on more, more, and more, but not so well when there is less or an expectation of less. This is not the Malthusian thesis, which maintained that at some point the world would run out of food to satisfy a growing population; it is an assertion that capitalism depends upon final demand and that if there ever comes a time when population growth slows, then the world’s most efficient economic system will be tested. If anything, my thesis is anti-Malthusian in its assertion that there will always be enough production to satisfy a growing population, but perhaps not enough new people to sustain growing production.
Observers will point out, as shown in the following chart, that global population growth rates have been declining since 1970 with no apparent ill effects. True, until 2008, I suppose. The fact is that since the 1970s we have never really experienced a secular period during which the private market could effectively run on its own engine without artificial asset price stimulation. The lack of population growth was likely a significant factor in the leveraging of the developed world’s financial systems and the ballooning of total government and private debt as a percentage of GDP from 150% to over 300% in the United States, for example. Lacking an accelerating population base, all developed countries promoted the financing of more and more consumption per capita in order to maintain existing GDP growth rates. Finally, in the U.S., with consumption at 70% of GDP and a household sector deeply in debt, there was nowhere to go but down. Similar conditions exist in most developed economies.
The danger today, as opposed to prior deleveraging cycles, is that the deleveraging is being attempted into the headwinds of a structural demographic downwave as opposed to a decade of substantial population growth. Japan is the modern-day example of what deleveraging in the face of a slowing and now negatively growing population can do. Prior deleveraging periods such as what the U.S. and European economies experienced in the 1930s exhibited a similar demographic with the lowest levels of fertility in the 20th century and extremely low population growth. Things did not go well then. Today’s developed economies almost assuredly offer substantially less population growth than the 1.5% rate experienced over the prior 50 years. Even when viewed from a total global economy perspective, population growth over the next 10–20 years will barely exceed 1%.
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