I can only speak about the NPC's and NIC's on my campus but I think it goes pretty much for the all of them....
Yes, financial responsiblity is a big part in keeping in Good Standing with an org. But I think that would be the case whether your in NPHC, NIC, NPC, Locals or whatever.
There were many ppl at my school who are in Greek orgs and dont have it easy financially.Alot of us were on financial aid and some worked 2-3 jobs just to stay in school. But the orgs so everything in their power to help you out, whether its setting up a financial plan or giving you a chapter or org. scholarship to help out. So no, speaking for the NPC's and NIC's and even NPHC's on my campus....we dont eliminate you if we dont think you can afford it. I'd take a hard working struggling sister any day over one that flaunts mommy and daddy's cash all the time.
At UM you could tell who was rich or poor anyways unless they did flaunt it. There were kids there who's parents (keyword is parents) were worth billions and they walked around wearing thrift store clothes and driving old beat up cars.