You write like there's some grand unified purpose to this whole thing. There isn't. This is the natural consequence of not setting a budget, which many different sides had different purposes to not set.
Ostensibly, the consequences of a government shutdown are, supposedly, lower FUNDING to pay for some government service. Given this, it would seem that HIGHER spending would seem ridiculous. Financial motivations in cases like this are supposed to override anything else. The motivations are clearly NOT financial.
So the belly-aching about how A and B are suffering because of a lack of funding is not necessarily true. It could also be to make this situation seem worse than it is. In public discourse, the squeaky wheel gets the funding.