> Far less fraud as a result.

Who returns your money to you if you purchased something on mail order with this, and it turned out to be fraud?

Third party escrow, if you explicitly used one. There's no free lunch.

And now you have invented Visa and MasterCard again.

Rather a dissociated escrowing from payment processing.

When you go to your local restaurant, do groceries you are paying a few percentage in tax for using you card.

Platforms online already act as escrow anyway. PayPal, Stripe, act as escrow..yes they take a percentage, but that's more granted for these cases.