Oh yeah - great idea IF all the people in power - our governments, police forces, armed forces etc. were a nice, extremely intelligent, well-behaved, entirely honorable bunch who would never, ever made a mistake about anything, or never, ever spied on/arrested/tortured/killed anyone for illegal/highly suspect reasons.
But that's hardly the case, is it?
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." ~ W. Somerset Maugham