Disagree with your premise on convincing poor people to continue living poor.
Don't see how e-cash isn't a big step forward in connecting the unbanked to Bitcoin. It's accessible to anyone with a smartphone, which is a huge and rapidly growing population. Besides that, e-cash seems like the solution to physical cash on the Bitcoin network, for those without Internet access.
I'm not technical enough to design it, but the fact that e-cash can transfer offline with a QR code means the QR code could be printed on a physical note and transferred person to person. I'm imagining some system of printing the QR code in a way that couldn't be scanned without permanently destroying the note. That way it could be used peer to peer without an internet connection and as long as the note is intact the e-cash is valid. But anyone with an internet connection who wished to could destroy the note, scan the QR, receive the e-cash, and redeem it for self custodial Bitcoin at any time.
Something else for nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg to create in all his spare time 🤣