We're in a pretty different circumstance so this probably won't be useful, but in our case, my wife has a bank account and I don't. Our belief as fundamentalist Christians is that I as the man have final authority in the family, including over financial matters. I'm also the sole earner, but that wasn't always the case.

We have very little money but it's my sacred duty to always think of how I can care for the family as best as possible, and we've been very comfortable (even when we had basically no money). I've found that when I surrender to God's power, things always turn out for the best. Even in times where it seemed to be a terrible idea, he always had something planned.

Whereas when I stubbornly insist on myself, everything se fracasa bien feo. So I guess my financial strategy is to dissipate my ego and melt into Christ's mind. God is so cool.

Good luck OP, I hope your country's election goes well for you guys!