Comment Trade-offs (Score 1) 83
Want greatest privacy? Use cash.
Want to give up privacy for the convenience? Use mobile payment. And, if we know Google well enough, they'll most likely let you track your spendings in neat little infographics.
Obviously if you don't want your wife to know you bought a Fleshlight then don't use a credit card. But for mundane payments like a burger at McD, why the he'll not?