Wallets are too bulky. Before heading out i'll stick my cashcard and some cash in my pocket.. I don't want to carry a stupid fob around with me.
You could try shopping around for some more compact wallets. Not all of them are bulky. I never used to use a wallet but i found i needed a new bank card every year as the chip and pin part got damaged.
The barclays online system is a lot less mobile than that
