The framers of the Constitution understood that we came from a revolt against what was viewed as an oppressive government. As such, they accepted the possibility that our own government may go awry of representing the will of the people. In such cases, there are three options, typically used in order, Soap Box discussion, Ballot Box voting, and Ammo Box reloading. That last option gives weight to the two leading up to it.
Yes, a government that has no fear of its citizenry uprising effectively will also have no fear of abusing or misusing it's power. I am an idealist at heart, but the drive to the "ideal" is often littered with ugly realities.