Comment by mike_hearn

For better or worse there's no such thing as "Europe" despite the wish of many on HN.

Such a system exists in, for example, Switzerland. Actually there are two such systems that aren't compatible. There are QR code invoices for domestic payments, where the code includes the target bank account details, amount to pay, transaction details etc. That's scanned by your bank app, direct p2p payment. And there is Twint, which is a domestic consumer payments app. The QR codes often contain short one time use codes that are looked up server side.

Why do people use them: because it's easy and the fees are low. Banks give you QR code invoices even for small businesses for free. Twint is a bit like Venmo, you can send to numbers in your address book for free, and for businesses they can do website integrations easily and even print out static QR codes to stick on market stalls etc.

Twint isn't as fast, convenient or reliable as NFC card payments so the card/tech companies still have an advantage. But it's been getting better. Maybe at some point the NFC elements in the card tech will become flexible enough to allow arbitrary mobile apps to be as good as tap-to-pay.