MUMBAI—The central bank announced a crackdown on digital fraud after citizens discovered UPI can move money faster than common sense. New alerts will warn users in font size that induces childhood fear.

Tech founders called it a UX problem; victims called it a universe problem. Cyber police asked public not to click links sent by stranger who calls you beta.

Economists said $2.5 billion could buy many schools or one very aggressive Instagram scam farm.