Really interesting analysis from No More Mr Nice Blog. Key grafs:
The Republican Party at this point in time is entirely made up of Punishers who think they are entitled to treat the government--and especially the government of Barack Obama--as waiters who need to be shown their place. This should surprise no one. At heart the entire Republican Party is made up of winners and losers and they are united in just one thing: they think that money is the only way to tell who is who. If you have money, you use that to distinguish yourself from the losers and to demonstrate your superiority by punishing them further. If you are a loser--a worker, for example, or have no health insurance (say) your job as a Republican is to take your status as a given, accept it, and turn around and get your jollies kicking someone else farther down the line.
I'd even argue that Reince Priebus's absurd "offer" to pay for a few employees to keep the military site open for the honor flight vets was an example of a perfectly logical extension of the tipping principle: that people with money should get better treatment than ordinary customers. That the government's attempt to treat everyone uniformly in both the Sequester and the Shut Down is, to the Republican way of thinking, a greater affront than almost anything else. It flies in the face of the "do you know who I am?" principle which underlies Republican thinking about the nature of the world.
The whole post is worth a read.