The United States government already interferes on behalf of Visa and MasterCard to maintain their duopoly across the globe.

Look at the tension between United States and Brazil on this issue with their nationalized payments system.

The fact is the most important relationship Visa and MasterCard have is the one you left unsaid - their relationship with the United States government.

It doesn’t have to cover everything. Put international to one side, just make a system for domestic payments. Like much of Europe has.

SEPA?