Washington has repeated nearly every economic policy mistake of the 1930s in recent years, so why not repeat one of the bigger blunders of the 1960s too? We refer to President Obama's proposal yesterday for a new "Buffett Rule" to raise taxes on Americans earning more than $1 million a year. This may sound familiar to readers of a certain age, because it is how the current, and much-hated, Alternative Minimum Tax was born.

Mr. Obama, meet Joe Barr. As LBJ's last Treasury Secretary—he served only 30 days—Barr became famous for his January 1969 testimony before Congress that 21 millionaires had paid no income tax in 1967. No fewer than 115 tax returns reporting income above $200,000 had also paid no income tax, and Barr predicted a "taxpayer revolt" unless something was done about it.

Washington proceeded to bend tax policy to chase those 21 millionaires, and so we got the Minimum Tax of 1969 that later became the Alternative Minimum Tax. The AMT now hits some four million taxpayers, and 27% of households that paid it in 2008 had adjusted gross income of $200,000 or less.

Editorial page editor Paul Gigot on Obama's tax pitch.

Because it hits taxpayers with heavy deductions, the AMT wallops in particular the upper-middle-class suburbs in high-tax states like New Jersey, Connecticut, Illinois and California. Congress keeps passing an annual reprieve to prevent the AMT from hitting another 20 million or so taxpayers, most of whom are far from millionaires.

So here we are back at the same old political stand, though even Mr. Obama concedes that today those he routinely calls "millionaires and billionaires" pay at least some tax. The President's complaint, echoing billionaire Warren Buffett, is that too many billionaires pay a lower rate than regular salary earners. So even as he endorsed tax reform in general yesterday, Mr. Obama insisted that one of his reform "principles" is that people who make more than $1 million must pay a higher tax rate than middle-class earners.



If Mr. Obama really wants all of these people to pay even more in taxes, there are only two ways to do so. One is to raise tax rates on capital gains, dividends and other investment income that is taxed at 15% and represents a great deal of income for the wealthy. This is probably Mr. Buffett's tax secret, though to our knowledge he hasn't released his returns to the public.


The other way to raise taxes on the rare Buffett is with a new Minimum Tax, a la Joe Barr. But as we've seen with the AMT, while the politicians may start by chasing "millionaires and billionaires," over time they always end up taxing the middle class because that's where the real money is. Mr. Obama could tax every billionaire in America at a 100% rate and still wouldn't make a dent in the federal deficit. He would, however, succeed in making those taxpayers invest less and search for tax shelters, assuming they didn't move offshore.

We rehearse all of this because it shows that the real point of Mr. Obama's Buffett Rule and his latest deficit proposal isn't tax justice or good tax policy. It is all about re-election politics. Down in the polls and facing a sullen liberal base, Mr. Obama wants to rally the left behind him, and nothing fires them up like the pretense that government is sticking it to the rich. Mr. Obama is picking a tax fight that he apparently believes will carry him to re-election next year.

And what about the economy? Well, the plan Mr. Obama unveiled yesterday along with his Buffett Rule would sock the economy with $1.5 trillion in new taxes over 10 years, or about 1% of GDP. This includes the tax increases built into the 2013 expiration of the Bush-era tax rates but not those of ObamaCare. Anyone who believes this will help an economy that is creating few new jobs and growing by only 1% probably also believes that only the rich would pay the Buffett Alternative Tax.