@maccruiskeen @stefan That's what my country (Brazil) did. PIX is operated by our Central Bank, is lightning fast, and mostly free of charge (Corp accounts pay a fee, but it is cheap).
The entire thing costs like 10M USD a year to run last I checked. For a country this big, it's an absolute bargain.
This has revolutionized things so much that Trump used it to justify sanctions (because it hurts Visa and MC).