Inspired by comments over at Michael the Leveller's blog, I discovered a powerful yet concise way to convey my thoughts on the power of the church and government.
Government has the power to restrain evil, but only the church can change hearts. God gave us the Holy Spirit and Church to change hearts, as that naturally restrains evil. Thus, as Christians, if the same amount of money and effort that is poured into political campaigns were diverted to local missions and evangelism, perhaps we would be able to realize the full and awesome power of the Holy Spirit and Church to affect society. Changing hearts invokes willing spirits, while coercion is the government's tool for restraining evil.
Okay, I'm not sure if that made sense, but it seemed profound at the time. God didn't give us the government - let's start using what He did give us.