In countries without these regulations Visa and Master argued most of these processing fees goes back to customer as cash back or gift or other forms of benefits. In the AUS and EU ruling the court simply decided that is not a business model being accepted in the market. And tell them to put out a fair price of payment processing.

And most of the payment in EU are still done via Debit Card or something similar so they have less leverage.

Along with high level of fraud in US credit card compared to EU.