Because of bureaucratic stuff, I'll have to demand more money from my members. It's not much, around 5€ a month. Each member already pays a membership fee (15€ / month) which is really fair and will be still low compared to other communities in the area.
Most of the members come from poor families or families with migration background, hence, they don't have much money but I know, through other members, that everyone could basically afford it. I can't influence the additional costs and they have to be paid. Everyone who refuses to do so must leave my community.
I do absolutely not like this but my state made it so and I can't influence it. I already explained the situation to the worried members. Some of them have no other community to establish or integrate themselves in the society. For some of them, my community is their only opportunity to get to know other people. Because of these circumstances, I advise them to pay the extra fee as most of them can't afford to join another community. If they leave, I fear that they'll lose important friends and an entry point to the society. It affects parents and their children likewise.
Still, a bulk of members deny to pay the extra fee. I already told them that it's for their best to be part of the community. But they insist to leave if the extra fee is enforced. The real problem now is that a lot of members share the intention of not paying which will definitely break the community out of a financial long-term view. And if the community breaks, there will be absolutely no chance of forming another community which has low membership fees.
How can I make clear that the extra fee has to be paid because, otherwise, it would break the whole community?
There's no opportunity to demand bigger grants or more money from the state for the families. The membership fee can't be paid by a third party because there is none.
Edit: Concerning the "anti-fraud" system: it's just a document which is signed by me and proves that every member paid the fee. It's there to prevent people from not paying the fee and still participating in the community.
@Andy's comment: Actually, there are institutions and they could even pay the fee. But since the community receives government help, these institutions are not willing to pay the fee entirely. Also, these organizations demand that I repay them, not everything but around 30%. Most charity organizations don't help me as there are other communities which are in despair, too, and they need the help even more because they aren't government founded. Basically, I could ask these organizations to pay them but it would most likely be the same as with @just_curious' idea: I can't pay for everyone and people start to claim about inequality.
I have now talked to the local authorities and sent an email to the state. They responded that the fee is necessary to cover "costs which are of temporary cause". I was now informed that the members of my community have to pay the fee for at least six months, not forever.