Well yes, if the theonomists are right, politics, economics, foreign policy etc,etc... would be part of the church's message, and thats the problem I have with it.
Theonomy and reconstuction sound good on paper, it's a grand idea, and we probably would all like to see it to at least some degree, but I see 2 major roadblocks, the Gospel is the message we have been given to preach, I see nothing in scripture about the church being the agent of goverment reform, we are strangers passing thru to a new world, not pioneers setting out to build a new world, and I also believe in the depravity of man, what might start as a good idea, can turn out to be tyranny, if theonomic rule ever got started, the state church would be just around the corner, and I doubt it would be a baptist church.
I like some of the ideas that theonmists have put forward, their thinking on things like education and justice, but how do you implent this things outside the christian community? To a degree I have to ask how is this much different from the social gospel? It all just seems to be a postmil pipe dream....