A federal employee of the National Park Service who offers guided tours of Independence Hall in Philadelphia -- the birthplace of the Constitution -- stunned a group of tourists this week by telling them the Constitution and the Declaration of Independence were the product of "class elites who were just out to protect their privileged status."Mary A. Hogan, a federal employee making in excess of $95,000 per year in salary and benefits, provided a tour Monday afternoon at Independence Hall laced with factual inaccuracies and disparaging comments about the Founders and the Constitution.