And those experts were at least operating profitable legacy businesses, so had _some_ empirical proof of their claims (to wit: their products worked, even if not as well as the Valley's).
Now, lo and behold, we have a direct test of open source software vs. Krugmanesque proclamations. Krugman is simply not qualified to evaluate Bitcoin. You think he knows SHA-256 from a hole in the ground? He'll say it won't work just like legacy payment providers thought Paypal wouldn't work. And then he'll start advocating that it be prosecuted once it does threaten him, and then he will lose.
If someone can reliably predict macroeconomic trends and manage risk, what's their excuse for not being filthy rich? If they're not rich, I don't trust their tallent. If they are rich, I trust they won't give away their secret formula.
We have politicians who have misunderstand and politicise economics. Similar to how evolution is somehow now a liberal theory.
New Keynesian economics is not liberal or conservative. It says, in hyper-simplified form, save (conservative) in good times, and spend (liberal) in bad. Right-wing Central Europe is one of the few in recent memory to have implemented both legs. Politically conservative trade theory, about which there is consensus amongst economists, earned left-wing Paul Krugman his Nobel Prize.
Myth of the Rational Voter [1] explores issues economists have put to rest but the public refuses to accept there is consensus on. Similar to how the masses insist on perceiving "hackers".
[1] http://www.amazon.com/Myth-Rational-Voter-Democracies-Polici...
As for seasteading, there have been plenty of experiments testing the theory that a tiny nation can become very rich from being a laxly-regulated, tax-free place for rich foreigners to park money. It works very well until you try to generalise the results to larger economies and end up like a certain Mediterranean tax haven with a non-state currency...
The trouble with dismissing the knowledge accumulated by those whose experiments failed is the risk of being condemned to repeat them...
Besides, your comment basically says that you don't have data to support your position, but you have a hunch, so we should just trust you on this.
Now today the question is whether the "mixed economy" which allows unlimited state intervention (which does indeed lead to Cyprus) is better than fettered government and unfettered capitalism. We're going to find out.
Please don't destroy discussions.
He also suggests that people outside the field are making better contributions, but I haven't gotten to the part in the book where he argues that in detail.
Compare y2k to 2008 banking crisis?
2008 banking crisis: terrible things happened even with (or because of) the intervention of economists.
I'd say that computer science has shown similar failures when dealing with phenomena that are as large-scale and chaotic as economics. Artificial intelligence is one such area in which it has been difficult to produce results.
Using the word "system" as broadly as you have in this post seems like a recipe for shaky reasoning.
Postscript:
Computer science has delivered the goods in a way that economics just hasn't, as even Krugman admits[1]:
Why weren't they able to see this was a likely event? Well, rewind a bit and witness Bernanke writing in 2004 about the "Great Moderation" [2], the ostensible "decline in macroeconomic volatility": In other words, Bernanke thought the (nonexistent) Great Moderation was the result of improvements in monetary policy. Thereby approving of the monetary policy that inflated the housing bubble, while blithely unaware of the catastrophe that was to unfold. Conclusion: economists aren't so good at predicting economic events or structuring economic systems. Ben thought the system he'd helped build wouldn't fall down. It did. Time for some new ideas, from people who actually do build systems that don't fall down: computer scientists.[1] http://krugman.blogs.nytimes.com/2012/03/05/economics-in-the...
[2] http://www.federalreserve.gov/boarddocs/speeches/2004/200402...