The EU has less democratic accountability than I would like, but it is there. National governments have been brought down over their poor choices at the EU leve

The EU has less democratic accountability than I would like, but it is there. National governments have been brought down over their poor choices at the EU level. Even if you think Visa/MC made the right decisions in these cases, the fact that they're being made by private companies accountable to no-one should worry you.