GUWonder

Even that implemented with a sunset provision often ends up not sun-setting when the sunset provision is right on the horizon. Rather it just creates time for the provision to become so tolerated/relied upon as to more easily enable it to be made permanent in some way or another. And once the machinery of government gets used to operating in one way, it's slow to change gears so as to do things entirely differently from the grinding/disruptive way it wanted and instituted. This is the way of DHS -- CBP, TSA or otherwise -- even as it's not entirely unique to just this part of our government.