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Originally Posted by A_C_Slater
He did not say digging up dollar bills is productive, he was trying to show that digging up dollar bills is essentially equivalent to digging up gold. There are some things government can do to stimulate the economy that no private individual has the risk tolerance or resources to do.
Take an example of a hi-speed rail from Vegas to LA, not many private individuals would like to assume the risk of the billions of dollars this would cost. But imagine the economic multiplier of a prostitute servicing a client in LA then traveling to Vegas with him cheaply and quickly on hi speed rail. Previously the cost and time preference would have been too great to make the journey by plane or car. But now with hi-speed rail those LA hooker dollars can circulate throughout the Vegas economy and vice-versa. Also, the Hoover Dam, government built during Great Depression, allowed the creation on an entire city in the middle of a desert, how's that for public funding leading to private wealth creation? The private sector would never build something like the Hoover Dam.
Excellent, this is another idea that always needs debunking. If something cannot be made profitably, including accounting for risk, it should not be built, even by the government. If people won't pay enough to make the rail profitable, it should not be built. If the dam cannot be profitable, it should not be built.
Just because there is now a big dam and a city in the desert doesn't mean that project was an economic benefit. You have to look at the costs. And you have to discount the future benefits to present value to decide whether the project is cost effective. Even if the dam lasts forever (it won't, and also requires constant maintenance), that does not give it infinite value, just as an infinite stream of constant annual payments does not have infinite value.
What happens if the government does not build these things? Then all of the labor, land, capital, and raw materials are available to private industry, at a lower price due to greater supply. These can now be used profitably for some projects that might have been unprofitable before. It's a classic case of the seen and the unseen. We see the dam, the city in the desert, and the rail, but we don't see the better things we could have had instead, had these not been built.