The argument that, since the global crisis, the developed world has fallen into a period of weak growth that looks likely to last quite a few years was first advanced by one of America’s leading economists, Professor Laurence Summers, of Harvard, a former secretary of the US Treasury in the Clinton administration. Loading He took the term from its earlier use during the Depression of the 1930s, using it to mean “a prolonged period in which satisfactory growth can only be achieved by unsustainable financial conditions”. The Economist magazine explains that secular stagnation means “the chronically weak growth that comes from having too few investment opportunities to absorb available savings”. Let me tell you about some comparisons of our performance by decade, calculated by independent economist Saul Eslake in a chapter he contributed to the book, The Wages Crisis in Australia.

In the first eight years of the present decade, consumer spending – which typically accounts for just under 60 per cent of gross domestic product – has been slower than in any decade in the past 60 years. The major reason for this is that the present decade has seen household disposable income grow at an average real rate of just 2.2 per cent a year, which is less than in any of the previous five decades. Weak wages growth is putting a dampener on consumer spending. Credit:Mags King The biggest component of household income is income from wages. Its real growth in the present decade has been slower than in any of the five preceding decades. So, as I may have mentioned once or twice before, weaker growth in wages seems to be at the heart of weaker consumer spending growth and growth in the economy overall.

But the growth in consumer spending would have been even slower had households not reduced the proportion of their income that they saved rather than spent by 4 percentage points – to its lowest level since before the financial crisis. The slow growth in wages in the present decade has meant a decline in the share of national income going to wages, which (along with higher mineral commodity prices) has contributed to the higher share of income going to the profits of corporations. This “gross operating surplus” (which, Eslake says, is roughly equivalent to the sharemarket’s EBITDA – earnings before interest, tax, depreciation and amortisation) has averaged 26.7 per cent of GDP since 2000 – which is 3.5 percentage points more than it did in the 1980s and 1990s. If our economic performance seems better than the other advanced economies’, that’s just because our population is growing much faster than theirs. But this isn’t as good for business as it sounds. Eslake points out that, “while the share of the national-income pie going to corporate profits has increased, the pie itself has been growing at a much slower rate – so much so that the growth rate of corporate profits [as measured by gross operating surplus] has thus far during the current decade been slower than in any decade since the 1970s”.

Since it’s the rate of growth that share investors and business managers focus on, this says even business profits haven’t been doing wonderfully. Loading Which brings us to the national accounts’ bottom line – growth in real GDP. It’s averaged 2.7 per cent a year so far in this decade, which is less than in any decade since the 1930s. And get this. More than half the real GDP growth so far this decade is directly attributable to growth in the population. Growth in real GDP per person has averaged 1.1 per cent a year – equal to its performance during the 1930s, and slower that anything we’ve had in between. Get it? Allow for population growth – so you’re focusing on whether economic growth is actually leaving us better off on average – and our weak growth since the financial crisis becomes even weaker.

If our economic performance seems better than the other advanced economies’, that’s just because our population is growing much faster than theirs. The symptoms of secular stagnation that other rich countries complain of are: weak growth in consumption and business investment, slow improvement in productivity, only small increases in wages and prices, and interest rates that are low not just because inflation is low, but also because real interest rates are low. (The long-running slide in real long-term interest rates around the world demonstrates The Economist’s point that, globally, we’re saving more than households, businesses and governments want to borrow.) We tick all those boxes. Unsurprisingly in our ever-more-connected world, we too are locked into secular stagnation of a seriousness not seen since the 1930s. It’s just that our rapid population growth – plus the ups and downs of the resources boom – has hidden it from us. I remind you of all this today because it’s highly relevant to Tuesday’s federal budget: what it should be aiming to do, and how we should judge what it does do.