The Congressional Budget Office estimated on Tuesday that the Affordable Care Act will reduce the number of full-time workers by 2.5 million over the next decade. That is mostly a good thing, a liberating result of the law. Of course, Republicans immediately tried to brand the findings as “devastating” and stark evidence of President Obama’s health care reform as a failure and a job killer. It is no such thing.

The report estimated that — thanks to an increase in insurance coverage under the act and the availability of subsidies to help pay the premiums — many workers who felt obliged to stay in a job that provided health benefits would now be able to leave those jobs or choose to work fewer hours than they otherwise would have. In other words, the report is about the choices workers can make when they are no longer tethered to an employer because of health benefits. The cumulative effect on the labor supply is the equivalent of 2.5 million fewer full-time workers by 2024.

Some workers may have had a pre-existing condition and will now be able to leave work because insurers must accept all applicants without regard to health status and charge premiums unrelated to health status. Some may have felt they needed to keep working to pay for health insurance, but now new government subsidies will help pay premiums, making it more possible for them to leave their jobs.

The report clearly stated that health reform would not produce an increase in unemployment (workers unable to find jobs) or underemployment (part-time workers who would prefer to work more hours per week). It also found “no compelling evidence” that, as of now, part-time employment has increased as a result of the reform law, a frequent claim of critics. Whether that will hold up after a mandate that requires employers to provide coverage, which was delayed until 2015, kicks in is uncertain.