I think the author’s point is: If congress ignores the Constitution now, what will cause them to NOT ignore an amended constitution?
I think that is a valid question.
Also, what makes you think that the currently disengaged populace is going to suddenly become robust and active? A Constitutional Convention? I doubt it, especially if paying attention to it cuts in to their American Idol watching schedule.
I’m not saying we should NOT try to have a Constitutional Convention - I simply doubt that it would be very effective in reigning in the power-hungry elitists whom “We the People” continue to place in office.
However, of the three alternatives open to us Levin's idea is far preferable to the other two.