Already mentioned China. Hong Kong and Singapor are city-states based on trade, they have no other hope of creating markets than opening themselves to trade. Taiwan and South Korea were actually VERY protectionist in certain industries after WW2. They would protect vital industries for a time, then open them once they were competitive. You should read up on their economic history too.
Keep track of the context, will you? You wrote about welfare states, I quote:
The most successful economies in the last 10-20 years have been those which have large welfare-state oriented-governments.
There is nothing welfare about the fastest growing countries in recent history. Protectionism is another thing.
I dare you to give me an example of one single large country (i.e. Mexico-sized) which has not used protectionist or centralized measures in the course of their development.
All countries I know of have used protectionism to some degree at some time in their history. This is not the issue being discussed.

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