David Leonhardt at the New York Times gets it exactly right:
The reasons for the new American austerity are subtler, but not shocking. Our economy remains in rough shape, by any measure. So it’s easy to confuse its condition (bad) with its direction (better) and to lose sight of how much worse it could be. The unyielding criticism from those who opposed stimulus from the get-go — laissez-faire economists, Congressional Republicans, German leaders — plays a role, too. They’re able to shout louder than the data…
In an ideal world, countries would pair more short-term spending and tax cuts with long-term spending cuts and tax increases. But not a single big country has figured out, politically, how to do that.