[quote name='Prefect' timestamp='1314042919' post='4852482']
The last point is actually a kind of tautology, because the size of the economy is the sum of all spending. The people who fantasize about growth while cutting spending are idiots (and unfortunately, being a politician or even an economics professor is not mutually exclusive to being an idiot).
No one wants to cut all spending, they want to cut government spending. Considering that there are many fortune 500 companies hoarding cash, our economy does not require government spending to grow. As government spending goes down, businesses feel more secure about their taxes staying the same or maybe even going down. Lower taxes encourages businesses to spend more money in this country and hire more people. As businesses spend more of their cash, and hire more people, the economy improves. You may not agree with it, but it's not idiotic. The worst thing that can happen to our economy is that businesses take their cash and elect to spend it in foreign countries. Something which is happening today on a regular basis, and instead of making it more attractive for businesses to hire in the US, we get situations like the NLRB vs Boeing.
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There's no question that there's some supply-side effect from taxation, but the idea that business aren't spending now entirely because the government is spending and might maybe raise taxes at some point down the line sounds unreasonable to me. Even more unreasonable is the idea that businesses will start dumping money into middle and lower class hands, rather than continuing the upward distribution they've favored for so long.
Even if you could convince me that companies in general would pump their cash into the economy, there isn't demand. A company is far less likely to be concerned about hypothetical taxation later (and there isn't a whole lot of steam to raise corporate rates at the moment) if they can turn a profit now. If taxes make someone too expensive to keep on later, they can just be fired. It's really easy to do, easy enough that it would be odd for a company to turn down a chance at profit now for a fear that it'll be stuck with expensive ballast later.
And even if that weren't the case, strictly private sector spending (as wages and related compensation) would flow mainly to people who would use that extra money for
de-leveraging, so demand will continue to be flat. Since firms produce goods or services that need to be consumed for that company to make money back on their investment, weak consumption will not be good for them. Hence low investment in employees and production.
To be sure, government can't simply fix this by spending. But no one else has much of an incentive to spend at all- in investment, in production, as consumption. It's a vicious cycle which spirals down. Government spending can help, and it's certainly the only entity that will take some money off of the sidelines.
Money isn't scared of the US debt. We've had people flocking to Treasuries (though it's true that there aren't a lot of great places to invest just now), and more to the point the interest rates on US borrowing are extremely low. The US can spend money on the cheap and put it out to increase demand, or at accelerate the de-leveraging. Everything about the current situation in the US screams liquidity trap. That would not be solved by fiscal austerity on the government's part.