Disagree with this claim.
The people, in their sovereign capacity, made a decision to delegate additional powers to their government. Sovereignty is not lost when powers are delegated, only when the delegate starts to believe his powers are innate and not delegated, and the sovereign people start to agree.
Of course, this almost always happens. The Roman and Byzantine emperors, all the way up to 1453, exercised their absolute power in theory only as delegates of the sovereign "Senate and People of Rome."
The real rub will come only when (or if) a significant movement arises among the People to reassume powers that have been delegated. Recent history does not point in the direction of such a movement developing.
Who is buying all those guns and why? Maybe people just need a decent leader around whom to coalesce.