Not surprisingly, big government has been at the heart of the problem [in Ferguson]. Washington has incentivized the militarization of local police precincts by using federal dollars to help municipal governments build what are essentially small armies—where police departments compete to acquire military gear that goes far beyond what most of Americans think of as law enforcement. - Rand Paul, Time.comPolice militarization is definitely part of the problem here, but it doesn't follow that police militarization is necessarily an outcome of a powerful democratic government, or that it can only be addressed by the massive abolition of democratic governance that Paul has in mind. These are the unargued, non sequitur leaps of an opportunist transparently attempting to hijack a tragedy as a vehicle for an unrelated political agenda.
Rand Paul unwittingly draws attention to this a few paragraphs later when he notes - quoting The Heritage Foundation's Evan Bernick - that "federal agencies...as well as local police departments...come equipped with SWAT teams and heavy artillery."
To elaborate: big government may have militarized the Ferguson police, but it has also militarized government authorities that can serve as a check on the Ferguson police. At any given moment, President Obama and Governor Nixon can mobilize the National Guard or even active military to intervene on behalf of Ferguson's citizens. They are perfectly capable of doing this, not in spite of the power of the government but because of it. In fact, it is precisely because the President and the Governor are so powerful that it likely won't come to that at all. When the Ferguson police stand down, it will be because the massive, armed hierarchy of the state and federal government have given them no other choice.
The reason this hasn't already happened is obvious: Republicans won't let it. They are already decrying the President's call for an investigation by the FBI and the DOJ, and spinning further intervention as an egregious imposition on the local sovereignty. A deployment of troops - the reasonable and proportional solution - would have ignited all kinds of outrage about federal tyranny.
Who will police the police? Liberals have a pragmatic answer for this: a careful system of checks and balances, regulatory, enforcement and military agencies, all ultimately subject to popular control through democratic elections. Demilitarization can ameliorate some of the system's worst abuses, but as a final solution it's just incoherent: the whole point of a police force is that we militarize some people more than others in order to enforce the law.