How do the Republicans reckon they'll come out ahead after this? It'll be a GOP bloodbath in 2014.
GOP moderates will take a hit. The more conservative members that are driving this shutdown will end up strengthening their base, so they won't feel as much pressure.
And maybe I'm getting too cynical, but the extreme Republican line for years has been that government is the problem, not the solution. So I don't think the members chasing the base have the same interest in a functioning state that the rest of them do.