Asserting that the transportation industry has helped aid economic growth is not the same as asserting that smoking is healthy.
We are not arguing over the contribution of the transportation industry. We are arguing over the government subsidization of road building, which has a definite effect on the present shape and nature of the transportation industry. If the government had not built all the highways, the transportation industry would still be a strong determining factor in our economic condition. It would be larger in some ways, smaller in others.
Economics cannot tell us what the transportation industry would look like without the government-built interstate highway system. It can give us ways to make educated guesses, but that's about it. What it can tell us is that we would be wealthier, and that the transportation industry would be different from what it is now.
As dross noted, part of the problem is that you can't see what you can't see. With all these semi trucks rolling around, you can't see what innovations might have been made in private roads, or rail travel, or air travel, or whatever. Those innovations were aborted when the government decided to pick a winner. People used to travel by passenger train on for-profit lines. The interstate highway system killed that and now the government has to prop up Amtrak because the cost of operating a line is prohibitive. This illustrates another principle: every intervention necessitates a second intervention.
Politicians like to talk about high-speed bullet trains and how they'd like to see one built. The problem is that it can't be built by the free market anymore because of the interstate highway system. It drastically reduced the cost of one form of travel below market prices so that other forms of travel can't compete with it.
The free market is a laboratory where all ideas can be examined, tried, and adopted or discarded based on whether they make economic sense. When the government enters the scene, what it does is randomly pick some experiments and say "these will win, so we will throw everything into their support", while other experiments are told "these will not win, so we will inhibit or prohibit them".
I nowhere made that assertion. My assertion is that policies in the direction of socialism slow economic progress relative to what it would be without the policy in place.The assertion that the economic policies a country enacts does not attribute to their economic success is unreasonable.
China's growth can be attributed to its coming the other direction. They started with near-total socialism, and in many ways they still have it. But they have been loosening the chains ever-so-gradually, over the course of decades, and it is their movement toward the free market end of the scale, powered by their massive workforce, that creates their growth. Had they stayed stubbornly insistent on socialist economic policies, they would look more like North Korea right now.China applies more socialistic policies to their market than many large industrialized countries. Considering the population of China, it is reasonable to say that they do not fall into the category of "small" countries... Yet their market growth is "in spite" of their market policies? Maybe biased is not the best phrase... maybe double standard fits the mold better.
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