I don't want to get too political as this isn't the place but there are two major issues with the government "keeping us safe" with essentially unlimited surveillance on "everything & everyone."
First, it is controlled by people, & people often use such power for their own purposes. Like an Administration using the IRS & other agencies as weapons against its political enemies. With dirt on everyone
(and everyone has some secrets they'd rather remain secret), a government could use such knowledge to influence political decisions, say like a Supreme Court Justice changing course & twisting himself in knots to essentially rewrite a law he previously opposed to suddenly find it legal.
Second & more importantly, it simply doesn't work. Ft. Hood, Boston, Vaughn Foods, Garland, TX, Chattanooga, Umpqua Community College, San Bernadino -- ALL of these cases had prior online signs which should caught the attention of the government surveillance programs. All failed until after the fact. Why? Because when you spy on EVERYONE there is simply too much data to wade through. Information overload. I don't know about you, but I am unwilling to surrender my liberties so the government can track down a bad guy after-the-fact. Discovering things AFTERWARDS doesn't improve safety. When questioned before Congressional committees, the government could not point to even one case where their massive spying program has PREVENTED even a single attack.
Just my two cents...