I don't know that it's even got a "main purpose" per se. Like all statist travesties, it exists to consolidate an increasing amount of power in the hands of the state, and, to emasculate the Constitution -- and the Bill of Rights in particular.
Now, that said, this little beastie looks like a real humdinger. About eleven Giant Steps in the wrong direction, to coin a phrase.
After reading the Commission Report's introduction and index I agree completely. The recommendations are hideous and insidious.