"I would argue that what effectiveness we have seen to date is totally irrelevant to how effective it might be in the future," he said. "This program, 215, has the ability to stop the next 9/11 and if you added emails in there it would make it even more effective. Had it been in place in 2000 and 2001, I think that probably 9/11 would not have happened."'
OK, let's take your utterly preposterous claim at face value. Let's say that this program would have prevented 9/11, and would prevent another 9/11 tomorrow, and has done fuck-all in between. That means we'd save 3,000 American lives every 12 years. Call it 3,600 to make the math easy. That's 300 lives per year. Against the 4th amendment. How does that price measure up against some of our other freedoms?
To retain the right to drive automobiles, we spend 34,000 lives per year.
To retain the right to drink alcohol, we spend 34,000 to 75,000 lives per year (depending on how you count alcohol-related accidents).
To retain the right to use tobacco, we spend 440,000 lives per year.
To retain the second amendment, we spend 30,000 lives per year.
To retain the right to be obese, we spend 300,000 lives per year.
With the possible exception of tobacco, I support the retention of all those rights. Three hundred per year for The Fourth Amendment (and the chilling effect on The First)? Even if his preposterous supposition were true, it would be a bargain at ten times the price compared to some of the other rights we hold dear.