all of these focus on what the government "should" do. The government is broken. good luck getting it to do anything.
It makes glaring errors from time to time, and plenty of things it does non-optimally, but the fact is that almost every day I get up and find that the garbage gets collected, the streets get swept, the electricity is coming through the wires, the police aren't demanding bribes, foreign countries aren't invading, mobs aren't rampaging, and the little pieces of paper in my wallet can still be reliably exchanged for physical goods. How awesome is that?
I believe in small government, and I don't think the government should do many things, but you can't say that the government is incapable of doing anything.