The Wall Street Journal reported last week that "Executives and other highly compensated employees now receive more than one-third of all pay in the US... Highly paid employees received nearly $2.1 trillion of the $6.4 trillion in total US pay in 2007, the latest figures available."

One of the questions often asked when the subject of CEO pay comes up is, "What could a person such as William McGuire or Lee Raymond (the former CEOs of UnitedHealth and ExxonMobil, respectively) possibly do to justify a $1.7 billion paycheck or a $400 million retirement bonus?"

It's an interesting question. If there is a "free market" of labor for CEOs, then you'd think there would be a lot of competition for the jobs. And a lot of people competing for the positions would drive down the pay. All UnitedHealth's stockholders would have to do to avoid paying more than $1 billion to McGuire is find somebody to do the same CEO job for half a billion. And all they'd have to do to save even more is find somebody to do the job for a mere $100 million. Or maybe even somebody who'd work the necessary sixty-hour weeks for only $1 million.

So why is executive pay so high?

I've examined this with both my psychotherapist hat on and my amateur economist hat on, and only one rational answer presents itself: CEOs in America make as much money as they do because there really is a shortage of people with their skill set. And it's such a serious shortage that some companies have to pay as much as $1 million a day to have somebody successfully do the job.

But what part of being a CEO could be so difficult -- so impossible for mere mortals -- that it would mean that there are only a few hundred individuals in the United States capable of performing it?

In my humble opinion, it's the sociopath part.

CEOs of community-based businesses are typically responsive to their communities and decent people. But the CEOs of most of the world's largest corporations daily make decisions that destroy the lives of many other human beings.

Only about 1 to 3 percent of us are sociopaths -- people who don't have normal human feelings and can easily go to sleep at night after having done horrific things. And of that 1 percent of sociopaths, there's probably only a fraction of a percent with a college education. And of that tiny fraction, there's an even tinier fraction that understands how business works, particularly within any specific industry.

Thus there is such a shortage of people who can run modern monopolistic, destructive corporations that stockholders have to pay millions to get them to work. And being sociopaths, they gladly take the money without any thought to its social consequences.

Today's modern transnational corporate CEOs -- who live in a private-jet-and-limousine world entirely apart from the rest of us -- are remnants from the times of kings, queens, and lords. They reflect the dysfunctional cultural (and Calvinist/Darwinian) belief that wealth is proof of goodness, and that that goodness then justifies taking more of the wealth.

Democracy in the workplace is known as a union. The most democratic workplaces are the least exploitative, because labor has a power to balance capital and management. And looking around the world, we can clearly see that those cultures that most embrace the largest number of their people in an egalitarian and democratic way (in and out of the workplace) are the ones that have the highest quality of life. Those that are the most despotic, from the workplace to the government, are those with the poorest quality of life.

Over time, balance and democratic oversight will always produce the best results. An "unregulated" marketplace is like an "unregulated" football game -- chaos. And chaos is a state perfectly exploited by sociopaths, be they serial killers, warlords, or CEOs.

By changing the rules of the game of business so that sociopathic business behavior is no longer rewarded (and, indeed, is punished -- as Teddy Roosevelt famously did as the "trustbuster" and FDR did when he threatened to send "war profiteers" to jail), we can create a less dysfunctional and more egalitarian society. And that's an important first step back from the thresholds to environmental and economic disaster we're now facing.

This article is largely excerpted from Thom Hartmann's new book "Threshold: The Crisis of Western Culture."