Take for example lawyers, one of the groups holding professional degrees. To get a job with a US Attorney's office or the Department of Justice or a job as a judge with the federal government requires many, many years of quality legal experience. Yet, the CBO study, which notes the already low relative pay of the feds fails to take that into account. Take that fact into account, and the disparity between the better paid private sector lawyers of comparable experience and the federal lawyers is even more glaring. Why? Because the CBO study looks at the entire profession, including lawyers right our of law school in the private sector who of course have lower pay. No such lawyers on the federal side of the groups I mentioned.