BusinessWeek's Joshua Kendall has an article that helps explain why small business owners are paying a lot of attention to the push for health care reform. Kendall writes about some businesses' experience of having their health insurance costs skyrocket after an employee becomes "gravely ill." A practice that one former CIGNA employee calls "purging": Purging: It's an ugly word, and it describes an ugly practice. But Wendell Potter, formerly the director of media relations for CIGNA ( CI ), says that's exactly what health-insurance companies do when an employee at a small business is unexpectedly hit with a sudden, and expensive, illness: The insurance company "purges" the small company from their rolls. In June testimony before U.S. Senate Committee on Commerce, Science & Transportation, Potter said health-insurance companies "dump small businesses whose employees' medical claims exceed what insurance underwriters expected. All it takes is one illness or accident among employees at a small business to prompt an insurance company to hike the next year's premiums so high that the employer has to cut benefits, shop for another carrier, or stop offering coverage altogether—leaving workers uninsured. The practice is known in the industry as purging." Read Small Biz Purging: When Companies Lose Health Care here . Meanwhile, the Obama Administration continues put together statements and reports aimed at showing its support of small business. And nobody has been pushing the case of late more than Christina Romer , chair of the Council of Economic Advisers . Here she is following up last week's QandA on what's in the health care reform proposals for small business with another argument for why small businesses need health care reform as much, or even more than, any group: