Apparently the United States is trying to “go it alone” and isn’t listening to its allies in the G-20 who want to cut public debt rather than try and spend their way to prosperity. It’s unilateralism like this that is going to be the death of us. (Don’t worry, the tongue is firmly in cheek!)

The Wall Street Journal featured an opinion piece a couple of days ago, and reviewed the last several years of Keynesian economic theory in practice.

Like many bad ideas, the current Keynesian revival began under George W. Bush. Larry Summers, then a private economist, told Congress that a "timely, targeted and temporary" spending program of $150 billion was urgently needed to boost consumer "demand." Democrats who had retaken Congress adopted the idea—they love an excuse to spend—and the politically tapped-out Mr. Bush went along with $168 billion in spending and one-time tax rebates.

The cash did produce a statistical blip in GDP growth in mid-2008, but it didn’t stop the financial panic and second phase of recession. So enter Stimulus II, with Mr. Summers again leading the intellectual charge, this time as President Obama’s adviser and this time suggesting upwards of $500 billion. When Congress was done two months later, in February 2009, the amount was $862 billion. A pair of White House economists famously promised that this spending would keep the unemployment rate below 8%.

Seventeen months later, and despite historically easy monetary policy for that entire period, the jobless rate is still 9.7%. Yesterday, the Bureau of Economic Analysis once again reduced the GDP estimate for first quarter growth, this time to 2.7%, while economic indicators in the second quarter have been mediocre. As the nearby table shows, this is a far cry from the snappy recovery that typically follows a steep recession, most recently in 1983-84 after the Reagan tax cuts.

The response at the White House and among Congressional leaders has been . . . Stimulus III. While talking about the need for "fiscal discipline" some time in the future, President Obama wants more spending today to again boost "demand." Thirty months after Mr. Summers won his first victory, we are back at the same policy stand.

The difference this time is that the Keynesian political consensus is cracking up. In Europe, the bond vigilantes have pulled the credit cards of Greece, Portugal and Spain, with Britain and Italy in their sights. Policy makers are now making a 180-degree turn from their own stimulus blowouts to cut spending and raise taxes. The austerity budget offered this month by the new British government is typical of Europe’s new consensus.

To put it another way, Germany’s Angela Merkel has won the bet she made in early 2009 by keeping her country’s stimulus far more modest. We suspect Mr. Obama will find a political stonewall this weekend in Toronto when he pleads with his fellow leaders to join him again for a spending spree.

Meanwhile, in Congress, even many Democrats are revolting against Stimulus III. The original White House package of jobless benefits and aid to the states had to be watered down several times, and the latest version failed again in the Senate late this week. (See below.) Mr. Obama is having his credit card pulled too—not by the bond markets, but by a voting public that sees the troubles in Europe and is telling pollsters that it doesn’t want a Grecian bath.

Government spending has yet to create prosperity. The question is, are we learning anything from this?