I think this short term benefit of always choosing security over freedom has always been too tempting for politicans and leaders not to do it. The founders recognized this, which is why the 4th Amendment, along with the rest of the Constitution, is supposed to be enforced by the separate branch of government that is the Judicial Branch.
But you know what? The Judicial Branch hasn't kept up with the Executive at all. The Executive Branch has huge agencies within it. The Judicial Branch is just a few judges and their staff.
Why isn't there a Judicial Branch agency that safeguards the Constitution from the other two branches?? Why couldn't this agency have a bunch of people with Top Secret clearances working for it who answer to nobody but the Supreme Court and can be contacted by Edward Snowden type whistle-blowers whenever someone feels the folks they work for are undermining the Constitution?
We need a Constitution Protection Agency that is part of the Judicial Branch. Their entire job should be going after the bastards in the other two branches who go against the constitution.