1. bad faith: They're a corrupt band of thieves trying to plunder our pocketbooks
2. good faith: They're ideologically committed to this strategy and believe it is beneficial
I think I can argue #2 from a GOP perspective but I've always found their arguments to be thoroughly unconvincing so I don't know if I truly understand it.
It's much easier to handwave people away as corrupt and incompetent but that's effectively a stand-in for any power broking behavior you don't understand.