Twenty-seventh Amendment to the United States Constitution
On September 25, 1789, the first United States Congress gave a group of 12 amendments to the states for their approval.  Written by James Madison, these were the first 12 Constitutional amendments ever written.  One of them was an amendment about salaries for Members of Congress.  Madison wanted to protect against Congresspeople being able to give themselves raises whenever they wanted to, while they were in the middle of their terms and the people could not vote them out.