That's another point about the market we fundamentally disagree. While you say "the market was too complex for bureaucrats to centrally plan", you still believe the market can be controlled by regulations. That's because although you say the market is inherently inefficient, you still believe it follows very simple patterns and is predictable. The price of the shoe drops, the demand goes up. The price of the stock drops, the demand goes down. Unfortunately, the market does not work that way, at least not in the short term.
Take weather for example. When computers first came by, people were very optimistic that long term weather forecast can be achieved. After all, if it's just a matter of complexity as you suggested, powerful computers can take everything into consideration and predict the weather 20 days in advance. However, all efforts failed because weather is inherently chaotic. "The flap of a butterfly’s wings in Brazil can set off a tornado in Texas".
Taken in the aggregate, the market is quite complex, but individual purchasing decisions - say one person's choice to buy or sell an asset based on declining or increasing price - is fairly straightforward and predictable. It is a pretty general observation that if the price of an asset rises, people will be motivated to buy or hold that asset as it increases in value, driving demand and further increasing the price of that asset. It is true that the millions of assets and transactions add indecipherable complexity to the market, but the options people have when they carry out transactions are rather finite: buy, sell, hold. This is different from "chaos" which is a random scattering of infinite stochastic events. At least with complexity "trends" can emerge; when everybody sells stocks in a panic, the aggregate value of the stock market goes down (has it ever done anything else in such a situation?). So, your chaos theory doesn't quite hold here and, in any case, a "chaotic" market doesn't give us any more confidence about why we should leave everything to the whim of an unregulated free market.
The market is also inherently chaotic and is unpredictable in the short term. While the market is efficient in the long term, it almost always overshoot equilibrium while trying to achieve efficiency. That's not a defect of the market, rather it's a feature.
While this seems like a pretty plausible theory, it has yet to be tested in the real world, so, for now, it remains just a theory. The reason why this will never be tested is because it would be political suicide to let an economy sink into the mires of an economic depression that could last for decades before the market "stabilized" to some elusive, unproven equilibrium. People have real wealth tied in assets and are already intolerant of 2 consecutive quarters of zero growth (ie. a recession). I agree that society should learn to accept the uncertainty of the world - including the economic world - but at what cost? Wiping out the fortunes of billions to prove an ontological point?
Since equilibrium itself is impossible to pinpoint, the market swings until the conditions are right. And since the conditions constantly change, the swings never stop. Keynes believed that we can predict where the equilibrium is and work towards it. Unfortunately, he was mistaken and we paid the price for it.
Okay, here we agree. However, I think that the role of the government should be to temper these wild swings so that they aren't devastating. I refer back to my earlier point about how the government had to prime the market in nearly all times of crisis. The only depression I can think of that was bailed out by a non-governmental group was when J.P. Morgan and J.D. Rockefeller worked together to avert the panic of 1907 by infusing Wall street with their own cash. Even the richest billionaires and companies would have trouble doing something like that today.
Moreover, government initiatives can stimulate consumption (for example, CMHC, the GI bill and Fannie Mae in the US after the war) and Central Banks have done a pretty good job controlling the money supply to avoid high rates of inflation or deflation. To take the argument further, if the market were perfectly efficient, there would be no need for a central bank, or no long-term inflation or deflation, either (if prices reach some stable, perfect state).
However, since it implies that governments would bail out any banks that complied yet still fails, it creates moral hazards. Banks will follow regulations and then ignore risks, causing far bigger crashes. Social policies almost always creates moral hazards as well.
That is true, but I would argue that without government-backed deposits, there would be a smaller pool of potential investors. In the long run, I think it is a risk that I'm willing to take. The social policy discussion is your own libertarian sidepoint about social engineering that doesn't belong in a discussion of economics.
A government that maintain laissez-faire economy does not equal to a weak government. The British empire wasn't weak, neither was the US government. While Chinese government is still labeled as communist, it can be argued that they have less developed regulations than ours. (Not necessarily less regulations, only the regulations are constantly ignored by local governments and businesses).
Commerce thrived in Britain in part due to their laws and regulations that supported up fair and transparent business practices. This is important, and this is not to be confused with
less government. The American economy expanded at its greatest extent during a period of great protectionism and, I would argue, so did the British and the current Asian economies (try buying a foreign car in an Asian country that isn't subject to a 300% tarrif!)
Now, I don't believe in abolishing of the government. It can be argued that every government was created by the market to maintain some form of order. I am also not against all regulations. Since the market is efficient in the long run, generic regulations still has their uses. More importantly, the government is essentially a huge corporation which have the resources to undertake long term projects, although it's wrong most of the time but we can afford some waste at this stage. All I am saying is that we need to be aware of moral hazards and wastes. Government regulations can only subtly influence the market, they can't dictate the market. I didn't say abolish all taxes, I said taxes should be minimized and charged at the consumption level. The government should also avoid introducing social policies lightly. Good intentions do not guarantee good policies.
And I should end this by saying that I don't think the market is inherently inefficient; on the contrary, I think that the market is very suitable at allocating resources very efficiently in many cases - certainly better than the government when it comes to a lot of goods and services. However, there is a definite place for the government both in managing resource allocation and in controlling the economy to a certain extent. This is where you and I differ.