If it exercises my doctor's mind I imagine it occurs to a lot of people: are we a stuffed nation living off our mineral wealth? The thought that we're making a lot of our income merely by digging stuff out of the ground and shipping it overseas seems to worry a lot of people. Is that the best we can do?
Considering the fuss politicians, economists and the media are making about the resources boom, you could be forgiven for thinking mining had taken over the economy, but it isn't true. A lot of people think a nation makes its living by selling stuff to the rest of the world. That isn't true, either. Roughly 80 per cent of all the goods and services Australians produce (gross domestic product) is sold to Australians, not foreigners. Similarly, roughly 80 per cent of the goods and services Australians buy is bought from Australians.
In other words, our economy is roughly 80 per cent self-sufficient. At a pinch, we could make it completely self-sufficient, though this would involve a significant decline in our standard of living. Why? Because we'd be denying ourselves access to all those goods and services that other countries produce better or more cheaply than we could.
Here you see the only reason we need to sell things to the rest of the world: so we can afford to import things from the rest of the world. All of us enjoy those imports, but the notion that 80 per cent of us survive by living off the 20 per cent who produce exports is quite mistaken.
Economies work by a process of specialisation and exchange. We each specialise in producing something we're good at, sell what we produce for money (usually wages), then use the money to buy the things we need from other producers. Most of this trade occurs within Australia, but extending our trade to people in other countries makes both them and us better off, because we've got stuff they want and they've got stuff we want.
Thanks to the industrialisation of China and India - accounting for almost 40 per cent of the world's population - the rest of the world is prepared to pay record prices for our coal and iron ore. Those prices won't stay at record levels but, because the process of industrialisation takes quite a few decades, they're likely to stay a lot higher than they were for a long time.
Though minerals and energy now account for about 42 per cent of our export earnings, this still leaves 58 per cent coming from other parts of the economy: 18 per cent from agriculture, 17 per cent from manufacturing and 23 per cent from services (particularly tourism and education).
When you get down to it, mining accounts for only 7 per cent of the value of all the goods and services Australians produce. That leaves agriculture accounting for 3 per cent, manufacturing for 12 per cent and the services sector for 78 per cent.
We have a lingering tendency to denigrate the services sector because it doesn't produce anything you can see and touch. But this is silly. As our standard of living has risen over the years, services account for an ever-increasing proportion of the things we buy (there is, after all, a limit to how much we can eat and how many cars and TV sets we need). And, as we've seen, it's not even true that we can't export services.
It turns out that 84 per cent of working Australians are employed in the services sector - similar to other advanced economies. And although some service jobs are menial - chambermaids, cleaners, waiters and shop assistants - most of the clean, safe, highly skilled, well-paid and intellectually satisfying jobs are in the services sector: doctors, lawyers, bankers, architects, engineers, managers, consultants, clergy, accountants, journalists, actors, media personalities, academics, teachers and many more.
Take away mining and we wouldn't be quite as rich as we are, but most of the economy would look much the same as it does. Most of us would still have good, secure, well-paid jobs.
In other words, our economy has a lot more going for it than just the good fortune of sitting on a lot of valuable minerals.
In Australia, as in every country, public discussion focuses on the bits that aren't working as well as we'd like them to. The bits that are working well get taken for granted. It would be a pity if all this left people with the impression things in Australia are substandard. They're not.
The level of educational attainment in Australia is high and ever-rising. Tests show our 15-year-olds' literacy, numeracy and science are well above average for the developed countries. Seven of our universities are ranked in the top 200 in the world.
With the notable exception of Aborigines, Australians' health is good by international standards. Our longevity is among the highest in the world. So despite all our complaints, we have a good health system, delivering better results than the Americans' at a much lower cost.
Our material standard of living is around average for the rich countries, but likely to go higher. Our gap between rich and poor is also about average, but not as bad as the other English-speaking countries.
For the past 20 years we've had a particularly well-managed economy, with low inflation, falling unemployment and a rising standard of living. Our banks have been well-supervised and kept out of trouble. Most other advanced economies have huge levels of public debt, but ours is minor.
It's true our mineral riches won't last forever, so we do have to make sure we invest the proceeds wisely, particularly in education. But even without mining we still have a healthy, prosperous economy.
