let's not fool ourselves, this "anger" is coming from the social conservatives. sure, there is some dis-satisfaction over government spending, earmarks, etc. but that is not the main emphasis of the "anger" that all these articles are describing - the socons don't want to lose their veto power over the Republican party, that's the bottom line. and it doesn't matter to them that their votes alone cannot win elections, they still expect the party to be litmus test pure to them, or they will splinter off.
Take a look at Wayne LaPierre's statement. It isn't the socons who screwed the Party. The Party screwed them AND the libertarian fiscal conservatives. Bush and the hacks running the Party reneged on the Contract With America, which contained planks for both fiscal & social conservatives. For example, do you really think it's socons who wanted "public broadcasting" and the Dept. of Education saved? Was it socons who wanted Sandy Burglar let off the hook, and hobnobbed with the Clintons?