S&P Downgrade: Its the Institutions, Not the Debt

S&P just downgraded US government bonds from "AAA" to "AA+".  Their explanation:

We lowered our long-term rating on the U.S. because we believe that the prolonged controversy over raising the statutory debt ceiling and the related fiscal policy debate indicate that further near-term progress containing the growth in public spending, especially on entitlements, or on reaching an agreement on raising revenues is less likely than we previously assumed and will remain a contentious and fitful process. We also believe that the fiscal consolidation plan that Congress and the Administration agreed to this week falls short of the amount that we believe is necessary to stabilize the general government debt burden by the middle of the decade.

That is, the downgrade has as much to do with the US political system as it does with debt levels.  The ugly spectacle of a faction of one political party taking the economy hostage in the debt ceiling debate has trashed the rating agency's (and everyone else's) confidence in Washington's ability to make difficult compromises.