From this AP story about Congress holding Harriet Miers in contempt:

The House Judiciary Committee approved a contempt of Congress citation Wednesday against [one-time White House counsel] Harriet Miers. The Justice Department said it would block the citation from prosecution because information Congress is demanding is protected by executive privilege. Democratic Speaker Nancy Pelosi said the House effort was important nonetheless.

Say what you will about the pointlessness of these kind of actions (as well as non-binding resolutions), but at least when Congress is wasting their time with this, they’re too distracted to be raising taxes.