I understand corrupt. India is swayed with UPI(Unified Payments Interface) integrated on payment apps like Google Pay. Even if you buy a stuff for 10 bucks, you make digital payment.
Apple and Google Pay work without needing a connection, fortunately. What happens here quite often is that payment terminals fail so sometimes you're in a restaurant or bar and cannot pay your bill.
I've been living a completely cashless life since Google Pay was released. Wouldn't go back. Germany isn't fully there yet, especially restaurants and bars, but we're getting there.