[sirius87]

That traceability of transactions contributes to expansion of the tax net. About ~2% of India's population pays income tax and <12% of the population files tax returns.

For the longest time, certain professionals such as doctors running neighborhood clinics earned money only in cash, allowing them to skip the tax net or claim to tax agencies that they attend to many patients on a charitable basis. This is changing quickly with patients walking into clinics insisting on paying digitally, pushing doctors to open current accounts and have billing and payment systems.