Which retail-inspired payment system innovation has been most widely adopted by government agencies worldwide since 2018?

Government agencies are increasingly adopting retail-inspired customer service strategies to improve citizen engagement. From digital service kiosks to sophisticated loyalty programs for taxpayer compliance, the public sector is borrowing heavily from retail innovations. This trivia question explores one particularly successful government retail strategy that has transformed citizen interactions in recent years.

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Blockchain-based tax payment platforms with cryptocurrency options
Mobile payment applications with integrated government service dashboards
Biometric verification systems coupled with contactless payment terminals
AI-powered subscription models for recurring government fee collections