One of the most delusional conceits of "true conservatives" is that, if only all Republicans were principled like they are, we could get spending under control. It's a hell of a burden to be among the few, the proud, the philosophically pure while everyone else mouths conservative platitudes while secretly harboring dreams of a big-government regime that controls our every thought and action.
That is not how it works, and that is not why conservative dreams of spending restraint never seem to come to fruitition.