A Response to Gregory Mankiw’s 10/9 NYT Piece

by Matt B. on October 11, 2010

On Saturday, Gregory Mankiw – Harvard economics professor and former adviser to President George W. Bush – published an essay in the New York Times entitled “I Can Afford Higher Taxes. But They’ll Make Me Work Less.”  The essay is problematic on a number of levels, so I thought I’d write an in-line response.  My responses in bold.


An important issue dividing the political parties is whether to raise taxes on those earning more than $250,000 a year. Democrats say these taxpayers can afford to chip in a bit more. Republicans say raising taxes on those who already face the highest marginal tax rates will hurt the economy.

So I thought it might be useful to do a case study on one of these high-income taxpayers. Fortunately, I have one handy: me.

Now, watch.  Mankiw’s going to talk about his own motivations, but then he’s going to generalize those motivations across all high income earners.  Not a legitimate move.

As a professor at Harvard and the author of some popular textbooks, I am comfortably in the income range that would be hit by this tax increase. I have been thinking — narcissistically, to be sure — about how higher taxes would affect me. Maybe these thoughts can shed some light on some of the broader policy issues.

First, I have to acknowledge that the Democrats are right about one thing: I can afford to pay more in taxes. My income is not in the same league as superstar actors and hedge fund managers, but I have been very lucky nonetheless. Unlike many other Americans, I don’t have trouble making ends meet.

Indeed, I could go so far as to say I am almost completely sated. One reason is that I don’t aspire for much more than a typical upper-middle-class lifestyle. I don’t fly around on a private jet. I have little desire to own a yacht or a Ferrari. I own only one home, in which I have lived since 1987. Paying an extra few percent in taxes wouldn’t create a lot of hardship.

Okay so far.

Nonetheless, as Republicans emphasize, taxes influence the decisions I make. I am regularly offered opportunities to earn extra money. It could be by talking to a business group, consulting on a legal case, giving a guest lecture, teaching summer school or writing an article. I turn down most but accept a few.

And I acknowledge that my motives in taking on extra work are partly mercenary. I don’t want to move to a bigger house or buy that Ferrari, but I hope to put some money aside for my three children. They will never lead lives of leisure, but I hope they won’t have to struggle to find down payments to buy their own homes or to send their kids to college.

Suppose that some editor offered me $1,000 to write an article. If there were no taxes of any kind, this $1,000 of income would translate into $1,000 in extra saving. If I invested it in the stock of a company that earned, say, 8 percent a year on its capital, then 30 years from now, when I pass on, my children would inherit about $10,000. That is simply the miracle of compounding.

Thinking about what income would be like in a world without taxes might be an interesting intellectual exercise, but it’s an awfully strange place to begin an analysis of an issue that’s “dividing the political parties.” No one is proposing eliminating taxes.

If they were, however, you still wouldn’t run an exercise like this.  After all, without taxes, we simply wouldn’t have a government.  That means nobody to enforce Mankiw’s contract with his editor, nobody to protect Mankiw from getting mugged on the way to the bank, and nobody to ensure that if the bank goes under, Mankiw gets his money back. (And, of course, none of the hundreds of other services that the government provides, from public parks to street cleaning to subways – and on and on.)

Now let’s put taxes into the calculus. First, assuming that the Bush tax cuts expire, I would pay 39.6 percent in federal income taxes on that extra income. Beyond that, the phaseout of deductions adds 1.2 percentage points to my effective marginal tax rate. I also pay the Medicare tax, which the recent health care bill is raising to 3.8 percent, starting in 2013. And in Massachusetts, I pay 5.3 percent in state income taxes, part of which I get back as a federal deduction. Putting all those taxes together, that $1,000 of pretax income becomes only $523 of saving.

And that saving no longer earns 8 percent. First, the corporation in which I have invested pays a 35 percent corporate tax on its earnings. So I get only 5.2 percent in dividends and capital gains. Then, on that income, I pay taxes at the federal and state level. As a result, I earn about 4 percent after taxes, and the $523 in saving grows to $1,700 after 30 years.

Then, when my children inherit the money, the estate tax will kick in. The marginal estate tax rate is scheduled to go as high as 55 percent next year, but Congress may reduce it a bit. Most likely, when that $1,700 enters my estate, my kids will get, at most, $1,000 of it.

HERE’S the bottom line: Without any taxes, accepting that editor’s assignment would have yielded my children an extra $10,000.

This isn’t true.  See above.

With taxes, it yields only $1,000. In effect, once the entire tax system is taken into account, my family’s marginal tax rate is about 90 percent. Is it any wonder that I turn down most of the money-making opportunities I am offered?

Here’s the sleight-of-hand.  The relevant comparison is not between a world without taxes and a world with taxes – it’s between one or another tax proposal.

By contrast, without the tax increases advocated by the Obama administration, the numbers would look quite different. I would face a lower income tax rate, a lower Medicare tax rate, and no deduction phaseout or estate tax. Taking that writing assignment would yield my kids about $2,000. I would have twice the incentive to keep working.

In other words, Mankiw’s “family’s marginal tax rate” is still 80%, as compared to the 90% he quotes above.  (Thanks to Michele Zini for pointing this out.)  So when Mankiw asks, “Is it any wonder that I turn down most of the money-making opportunities I am offered?” one might respond by asking whether his incentives would really be much different under the Democrats’ tax plan.

Also, remember how Mankiw framed this whole exercise – as a case study into how one high-income earner – Mankiw himself – might respond to proposed changes in the tax structure.  Mankiw then argues that he would have “have twice the incentive to keep working” if we don’t adopt the Democrats’ tax proposals.  Is he really suggesting that his only incentive to work is money?  That he doesn’t derive any pleasure or gratification from his chosen field?  That he only performs tasks in exact proportion to the monetary reward they’ll yield?  If that’s true, it’s extraordinarily unfortunate for Mankiw.  But it isn’t true, of course.  Money is one reward for work, but it needn’t be the only one.

Now you might not care if I supply less of my services to the marketplace — although, because you are reading this article, you are one of my customers. But I bet there are some high-income taxpayers whose services you enjoy.

Maybe you are looking forward to a particular actor’s next movie or a particular novelist’s next book. Perhaps you wish that your favorite singer would have a concert near where you live. Or, someday, you may need treatment from a highly trained surgeon, or your child may need braces from the local orthodontist. Like me, these individuals respond to incentives. (Indeed, some studies report that high-income taxpayers are particularly responsive to taxes.) As they face higher tax rates, their services will be in shorter supply.

It’s certainly reasonable to point out that people respond to incentives.  I do wonder, though, whether the writing of good novels is much affected by the marginal tax rate.  As far as I can tell, good novels tend to be labors of love, borne of an intensely personal kind of work; it’s hard for me to imagine James Baldwin punching numbers into a calculator before deciding whether to write Another Country.

Reasonable people can disagree about whether and how much the government should redistribute income. And, to be sure, the looming budget deficits require hard choices about spending and taxes. But don’t let anyone fool you into thinking that when the government taxes the rich, only the rich bear the burden.

An alternative: “Don’t let anyone fool you into thinking that when the government acts in solidarity with the poor, only the poor benefit.” (Thanks to Jesse Lava for this point.)

  • Eric

    Beeb –

    Like where your head's at, and your close analysis of the argument. I'd be very curious to hear the man himself in response-response.

    More generally speaking, I'm reminded of Robert Nozick's “Wilt Chamberlain Argument” in opposition to the graduated income tax, and then of GA Cohen's reply. Nozick notes – justifiably, I think – that money freely given by free citizens in exchange for the pleasure of watching Wilt Chamberlain play basketball should go to Wilt Chamberlain. Any less than this and – I'm paraphrasing too much – Chamberlain loses the incentive to do what he does.

    Fair enough on paper, Cohen replies, but anyone who believes that higher taxes would discourage Wilt Chamberlain from playing basketball “misunderstands human nature, or basketball, or both.”

    Glad to see your blog is still up and running, but my central criticism stands – it's ugly as hell.

  • Matt B.

    Touche – yeah, I have to learn how to do more than type at some point. Why isn’t it all on a silver platter for me?

    You’re totally right to call on the Chamberlain argument – way more elegant than my version. But for me, the interesting question is what Chamberlain should do with that money once it’s in his pocket. Seems to me that we want to create a culture in which Chamberlain feels solidarity with folks who are struggling and shares what he’s got.

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