<WC1>As you might imagine, I find myself in a lot of discussions about U.S. fiscal policy and the budget deficit in particular. And there's one thing I can count on in these discussions: At some point someone will announce, in dire tones, that we have a trillion dollar deficit.
No, I don't think the people making this pronouncement realize that they sound just like Dr. Evil in the Austin Powers movies.
Anyway, we do indeed have a trillion dollar deficit, or at least we did; in fiscal 2012, which ended in September, the deficit was actually $1.089 trillion. (It will be lower this year.) The question is what lesson we should take from that figure.
What the Dr. Evil types think, and want you to think, is that the big current deficit is a sign that our fiscal position is completely unsustainable. Sometimes they argue that it means that a debt crisis is just around the corner, although they've been predicting that for years and it keeps not happening. (U.S. borrowing costs are near historic lows.) But more often they use the deficit to argue that we can't afford to maintain programs like Social Security, Medicare and Medicaid. So it's important to understand that this is completely wrong.
Now, America does have a long-run budget problem, thanks to our aging population and the rising cost of health care. However, the current deficit has nothing to do with that problem and says nothing at all about the sustainability of our social insurance programs.<WC>
<WC1>Instead, it mainly reflects the depressed state of the economy — a depression that would be made even worse by attempts to shrink the deficit rapidly.
So, let's talk about the numbers.
The first thing we need to ask is what a sustainable budget would look like. The answer is that in a growing economy, budgets don't have to be balanced to be sustainable. Federal debt was higher at the end of the Clinton years than at the beginning — that is, the deficits of the Clinton administration's early years outweighed the surpluses at the end. Yet because gross domestic product rose over those eight years, the best measure of our debt position, the ratio of debt to GDP, fell dramatically, from 49 <WC>percent <WC1>to 33 percent.
Right now, given reasonable estimates of likely future growth and inflation, we would have a stable or declining ratio of debt to GDP even if we had a $400 billion deficit. You can argue that we should do better; but if the question is whether current deficits are sustainable, you should take $400 billion off the table right away.
That still leaves $600 billion or so. What's that about? It's the depressed economy — full stop.
First of all, the weakness of the economy has led directly to lower revenues; when GDP falls, the federal tax take falls too, and in fact always falls substantially more in percentage terms. On top of that, revenue is temporarily depressed by tax breaks, notably the payroll tax cut, that have been put in place to support the economy but will be withdrawn as soon as the economy is stronger (or, unfortunately, even before then). If you do the math, it seems likely that full economic recovery would raise revenue by at least $450 billion.