Amoral Reason for Limited Government

I've often wrestled with many of the moral arguments in favor of small government. Though I value the Declaration of Independence as much as the next American, the idea of personal and property rights being given to us by God has never sat right with my understanding of depraved humanity. Just recently I discovered two different types of libertarianism. The first, Deontological libertarianism, is the idea that acts of force are always immoral, whether by man or government. The other, Consequentialist libertarianism, states that liberty leads to the most prosperous outcome and should for that reason alone be supported. Whether it's drugs, foreign aid, or sustainability, I think that the collective decisions of the market will create a better outcome, and for that reason alone I advocate for it.