All communication between any attorney and their client is privileged. The Solicitor General's office is basically the appellate division of the Department of Justice. Their client is US Government. As a result, the Solicitor General's office and the US Government enjoy an attorney/client relationship.
All work product created in anticipation of any litigated matter is privileged. The memoranda that circulate through a law firm (which explore legal theories, discovery strategies, settlement negotiations) on anylitigated matter are work product. This is a BASIC legal principle. Forcing the US Government to give up the work product of its attorneys would be similar to requiring the attorney to reveal the contents of his private convesations with his client. It would, therefore, completely gut and violate the attorney/client privilege.
But thanks for the vote of confidence.
-PJ
You're are absolutely correct ..