The Purpose of Government

I watched the State of the Union Address and the Democratic rebuttal (which all seems curious to me). (Not to mention that insane female senator, who shall remain nameless, and her theatrics!)
As Christians, it would do us well to consider, at least first, what God says the purpose of government is. From there were can dream our dreams of Republicans and Democrats and whatever else we might salivate for.
Paul wrote, "For rulers are not a terror to good conduct, but to bad. Would you have no fear of the one who is in authority? Then do what is good, and you will receive his approval, for he is God's servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God's wrath on the wrongdoer" (Romans 13:3-4, ESV).
From what Paul has written, one can see that God appoints persons to authority -- the government -- for two reasons: here then is the raison d'etre of government: are you reading this carefully? The purpose of government, according to God, it to protect her people from evil and to punish evil. That is the extent of the purpose of government.
What about health care, taxes, social security, the preservation of my right to be and do as I please and be awarded a gold star for doing it, (cf. nominating a movie for an academy award for the reason that it features someone putting his hoo-hoo in another guy's haa-haa -- but that's off the point of this post.), etc?
The point is -- government is to protect us from evil and to punish evil. That plays out in many ways. But it should also make us wonder if we haven't forgotten about our duty as the Church to provide assistance for our members and even the world. Perhaps, while the government is protecting us from the evil monsters and punishing them when they do evil, we should be doing good in the Name of Jesus Christ. Perhaps one of the jobs of the Church is to care for the flock -- and those who have yet to come into the flock.