Standard and Poor's downgrade of U.S. government debt captured headlines across the country and around the world. It is a newsworthy event, but primarily as another colossal failure by a major credit rating agency.
First, it is worth mentioning the important background here. S&P, along with the other credit rating agencies, rated hundreds of billions of dollars of subprime mortgage backed securities as investment grade. They were paid tens of millions of dollar by the investment banks for these ratings. We know that concerns were raised by their own people about the quality of many of these issues. This was at the least astoundingly incompetent. It was quite possibly criminal.
This raises the question of whether S&P fears an investigation and possible prosecution. In such circumstances the desire to curry favor with powerful politicians could certainly influence their credit rating decisions. There are also rules affecting the credit rating agencies in the Dodd-Frank financial reform bill. The desire to have these rules written in a favorable way could affect the credit rating agencies' decisions. It would be nice if we could just assume that the credit rating agencies make their rulings on an objective assessment of the evidence, but we can't.
Let's look at the evidence. S&P made a big point of citing the fact that the debt deal did almost nothing to slow the growth of Medicare and other entitlements, obviously alluding to Social Security. S&P surely knows that Medicare's cost growth is driven by projections of explosive growth in private sector health care costs. The projections it relies upon from the Congressional Budget Office show that the cost of providing health care to an average 65 year-old in the private sector will be almost $20,000 (in 2011 dollars) a year by 2030. Of course, this will make Medicare unaffordable if it proves true, but this projected explosion in health care costs will be devastating for the U.S. economy even if we eliminated Medicare and other public sector health care programs altogether.
If S&P were being honest, it would have written about the need to fix the U.S. health care system. Instead it talked about the need to cut Medicare. Of course, if U.S. health care costs were comparable to those in any other country in the world, then we would be looking at massive surpluses in the long-term, not deficits.
The reference to Social Security also cannot be supported. The program is financed by its own designated tax. Under the law, if benefits exceed the money raised by the tax, then they are not paid. If S&P assumes that Social Security will add to the deficit in future years, then they are assuming that Congress will change the law in a way that no one is now proposing.
It is also worth noting that the projected increase in Social Security as a share of GDP over the next 30 years is 1.6 percent. This is roughly the same as the increase in the annual military budget since the days before September 11th. An unbiased credit rating agency would not be highlighting one increase while ignoring the other.
There are other problems with the S&P downgrade. U.S. government debt and its derivatives (e.g. the $5 trillion of mortgage backed securities issued by Fannie Mae and Freddie Mac) are the backbone of the U.S. financial system and indeed the world financial system. If U.S. debt is in fact less creditworthy, then all the banks and financial companies that rely on its value should also be less creditworthy. Yet, we didn't hear of J.P. Morgan, Goldman Sachs and the rest being put on the watch list for a downgrade. Why not? Perhaps this is because S&P doesn't take its own rating seriously.
Finally, what does the risk of default on U.S. government debt mean? The debt is issued in dollars. That means it is payable in dollars. The U.S. government prints dollars. This means that if for some reason the government was unable to tax or borrow to raise the money to pay its debt then it could always print it. This may carry a risk of inflation, but S&P is not in the business of making inflation predictions, they are in the business of assessing the likelihood that debt will be repaid. (Of course if they are worried that inflation will erode the value of U.S. debt, S&P would also have to downgrade all debt denominated in dollars everywhere in the world.)
In short, there is no coherent explanation that can be given for S&P's downgrade. This downgrade was not made based on the economics. We can only speculate about the true motive.
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