Using your credit card for all of your monthly expenses as opposed to using your bank card could actually be a great way to save money. 

When you use your Credit Card for all your living expenses, your income stays inside your All-in-One account, saving you interest.

Then, before interest is due on the card, pay the balance off using your All-in-One account.

Not only will you be using someone else's money throughout the month but, the more you use the card, the more Reward Points you can accumulate and the more merchandise and travel opportunities you can enjoy.