I think a convention is needed regardless. Future presidents and congressmen will not always be friendly to liberty.
Somehow corruption creeps in no matter. We need to start with changing ourselves instead of thinking we can curb evil with a document. I live on a small cul de sac and today I was just realizing that while there are several paychecks coming into each household there are only two people in the lot that paycheck does not come from the gummint in one form or another. Depressing.