RFID wallets are necessary today. Back when the only people using this tech was Mobil oil waving their fob at the pump...a cyber security prof had his class hook up a RFID reader to their laptops and went around stealing the info, recording where and when, (on subways, park benches, buses, lines to the post office, Starbucks etc.) And who they got them from (tall man, stiped blue suit glasses, etc), then they charged one dollar of.fuel, sent the person a dollar and told them all they did. They sent this info to visa, discover, amex, warning them his loose it was....and when they came out with chips anyway....they did it.again...
The banks could care less about security.