I'm no theologian, so I can only look at the plain words out of the context of Hebrew poetry.  A kingdom is a monarchy.  The king controls everything and the subjects/society obeys.  God's kingdom is going to COME, implying that we are waiting for it not creating it.  The whole prayer is passive.  Look beyond:  "GIVE us...FORGIVE us...LEAD us...DELIVER us."

Look at the parable of the sower:  we're seeds, not a stew.  And there are weeds within the good seed that threaten those of us who want to spread the word of God.  Those weeds are the secularists who are focused on THIS world, making the world the way THEY think it should be.  Jesus was very clear that our job is not to focus on worldly things, but on Godly things.  Pray, love God, resist materialism.  Government?  Not even a blip on the screen.