Yes, government lawyers need more focus on ethics, more accountability and more oversight. It is only natural to get a certain complacency and ethical slant when not being held to the same standards as colleagues in the private sector. That is why it is vital to have a corrective mechanism to keep individual lawyers on track.
Much like many police officers, government lawyers feel they are always on the right side and justify their actions when they do wrong. The public has long supported this. Government lawyers are supposed to be working to protect the public. The public wants to believe this. These government lawyers are more likely to make excuses for doing wrong as a result.
It is so ridiculous that these lawyers are being forced to take ethics classes. We all had that as an elective in college so they know better, they just don't care. Most lawyers will do whatever necessary to win a case. Unfortunately that plays to the negative sides of our personality, which is highlighted by their idiocy.
No, I do not believe that misleading a judge is a systematic problem with government lawyers. It is good that these lawyers were ordered to take remedial ethics classes. Government lawyers are just as trustworthy as any other group of lawyers so the problem may be lawyers in general and not government lawyers.