There is even small print in their report that says nothing they produce should ever be taken for predictive purposes or as a judgement of future economic activity. (CBO's Baseline Budget Projections Page 1-2)
It is meant to simply reflect changes in law with all else being equal assumptions from over the rainbow at Candy Mountain.
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That's not the small print. It's right there in the main text, at the beginning, where they just have to hope people actually pay attention to it.
And they also specify why the GDP figures - which is largely where all that revenue comes from - are as high as they are. First, they predict the economy will continue recovering from the recent downswing. Not exactly heterodox. Second, they say they're not even going to try predicting any longer term cycles. The later figures are there to serve as benchmarks when judging the effects of other proposals. Which is also how that section you refer to on page 2 ends
See, they even repeat the caution. Which, come to think of it, you've mangled significantly.
1). As I mention above, it's not in the small print.
2) They don't say nothing they produce should be used for predictive purposes or for judgement. They say the figures shouldnt be used as predictions of the economy. So what are they? They're predictions of what certain proposed laws will do and intended as benchmarks. In other words - compare them against other economic proposals and use that to help judge between them.
Your *supposed* to take everything with a grain of salt, and since they include a lot of the figures and assumptions they work with its relatively easy to use the CBO's work in your own proposals or criticism.
This document is a great illustration of that point: they predict % increases in both gov. revenue and spending. You think the spending will happen but the revenue increase won't? Then you can point out where you think your assumptions are better, and how that changes the predictions. Do that and you'll be using the document as intended.
And let's not forget the alternatives to the CBO. It's not that the CBOs projections are all that great, it's that everyone else's tend to either be even worse, or far more narrow.
Comedy Gold? The CBO doesn't write the over wrought headlines. It's really only ridiculous when you don't understand it, or don't use it right. Like a lot of things. Male genitallia, for example.