Wechat and Alipay do all that except the not keeping a record of transactions. There's tons of food places where the entire payment system is just a printed QR code and they just tell you how much to pay so there's nothing that can go down except the phone network and wifi.

You can also just give people money, which seems like it shouldn't work with a credit card because it's technically a cash advance. There's been a dozen times where a store that requires everything go through an app so they can make you click through 3 menus advertising discounts if you buy more items wouldn't work because I didn't have a Chinese number or something, and the employee would put in the order, then I'd give their personal account the money.

As goverment can known your card transactions already if needed, then what transactions you want to hide?