This Amendment made it so Senators could not give themselves a raise during their current term. This was an Amendment that was needed from the beginning, but it took awhile to get it put in to the Constitution. I have a feeling if the people knew that the Senators could have given themselves raises and probably did that would not have settled well.
This cartoon shows the corruption that not having this Amendment could produce. Especially right now while we are in the middle of a long recession the people of the United States wouldn't be very happy if their Congressmen decided they needed a raise using their tax money. They spend enough of our tax money as it is...