This week’s blog should get me in a lot of trouble. But I think it’s time that someone points out that many of the biggest business consultants, authors and speakers run really crappy businesses of their own.

Okay, I’ve heard all the jokes about consultants. All go basically down the same path—a consultant is someone who borrows your watch and then tells you what time it is. But this is someone much worse. I’ve discovered that many of the biggest advisors to business run shops that are much more poorly managed than many of the corporations that pay them such lofty fees.

Ironic isn’t it?

Take consultant number one—I’ve confided the real names to my editor, but dear reader you’ll have to give me some slack here, because these guys are my colleagues, and in some cases my friends.

Consultant number one has had a series of best selling books, he commands top dollar on the speakers circuit and chances are that you’ve heard or seen him at one time during your career. He is so volatile that he is barely able to hold on to staff for more than a year. He says he’s a great listener, but his staff says to me that he yells far too much to ever hear a word they say. His office might as well have a revolving door on it.

Consultant number two is one of the nicest guys you’ll ever meet. But his company is remarkably dysfunctional. Its top leadership seems to change with the seasons. More than any other, this company almost seems to be dedicated to violating every principal that it espouses in its publications and presentations with its own people. It is a rudderless, often contradictory and cruel place that talks about sharing the credit but seldom does.

Consultant number three has built a company with some of the lowest morale anywhere. It’s hard to sort out where the battle lines are worse, in the executive suites or in the trenches. At one point I actually got to see some of the company’s internal survey results and couldn’t imagine that any of this company’s customers own results were that pathetic. Employees felt that management was more likely to knife them in the back then pat them on it. Although there was a lot of talk about values, the organization seems to only hold one value dear, and that is making the sale.

Woody Allen once said that those who can, do. And those who can’t, teach. Clearly those who really can’t do something become top-priced consultants.

So what can we do about this? I’m not suggesting that anyone throw out the baby with the bathwater. Each of these three people I referred to above has an important message and strategies to share. I just believe that corporations need to do a better job of due diligence with the messengers it picks before it starts ramming the fad of the week down its own people’s throats.

Look at each possible vendor as a little laboratory for their own principals. Ask for proof that they eat their own dog food and practice the very principals that they are foisting on you, and the rest of the business world.

Many of you are probably saying to yourself that this doesn’t really matter. It all goes back to the “Hawthorne Effect”, remember, that’s where a company turned up its lights and found that productive increased. Then when productivity stabilized they tried turning the lights down and found—like magic—that productivity magically increased again. The lesson, is that over the short haul almost anything you do can potentially increase productivity.

So Corporate America do your homework. Just because someone is a brand name, don’t assume that their principles work in the real world. That’s the bad news. The good news, is that the due diligence isn’t that hard to do. You just have to take the pulse of the employees who work for the company you are thinking about hiring. Ask to see recently survey results and staff turnover rates. I can guarantee that often you’ll be surprised by what you find.

About the Author: Bob Rosner is a best-selling author and award-winning journalist. For free job and work advice, check out the award-winning workplace911.com. Check the revised edition of his Wall Street Journal best seller, “The Boss’s Survival Guide.” If you have a question for Bob, contact him via bob@workplace911.com.