There has never been an easier or more efficient or more effective time to spy on your own citizens as there is today. Whereas, in previous years you might need to have someone on the inside of an organization in order to infiltrate it and neutralize it, that isn't even often a step that need be taken. Listening devices are sophisticated, reliable, portable, cost-efficient, and effective, and while there may be laws that are suppose to protect you from indiscriminate eavesdropping by the government, the fact of the matter is, there are so many additional laws that supersede these "protections" that the government need not worry about them. Additionally, you don't need the manpower to track vehicles and where they go, where they stop at and where they visit at, the cars own GPS is vulnerable to hacking and if not hacked, the information is stored by the GPS provider and can be accessed.
The main problem that the Government has at this point in monitoring you is not the lack of information, but the overwhelming amount of information that has to be processed, correlated, and analyzed. Any thought that you can hide from the government, be anonymous to the government, can only occur if you are living a life that has no involvement with modern technology whatsoever, and people like that are virtually never a threat to the government.
There isn't anyone watching the watchers, while there may be oversight committees they are toothless and without effectiveness. In any event, even if these oversight organizations were to discover something untoward, they are so far behind the eight ball, that any hope of them being able to stop or prevent government spy agencies from doing what they desire to do is misguided and hopeless. Our present spy system is like a runaway train that cannot be stopped, cannot be diverted, and cannot be slowed down.
We are at the mercy of anonymous government spying agencies that will stop at nothing to obtain all the actionable information that they can obtain from its citizens and visitors within the United States. We would be wise to remember this prescient quote from C.S. Lewis: "Of all tyrannies a tyranny sincerely exercised for the good of its victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron’s cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience."
These are dangerous times. These are times in which the common man has no defense for spying agencies that have an ax to grind against them for legitimate or illegitimate reasons. Also, when government spy agencies have all the pertinent information that they can obtain from you, it is then easy for them to manipulate that data, to change and distort some facts, in order to best make a case against you because in theory their data is inviolable, whereas in actuality it isn't.
Also, ask yourself this question, what does an individual with immense spying power and the authority to use it, do in a situation in which he says to himself, "I don't like my neighbor and I wish to destroy him." He probably annihilates him, completely, irrevocably, and without mercy. Far from serving us, the people, government spying agencies serve only themselves in which their purpose it clear: We are all their slaves, their servants, and their subjects, and if we get out-of-line they will eviscerate us.
In short, God-like powers in the hands of fallen human beings is a formula for absolute tyranny and oppression. You have been warned.