Not necessarily. If the price in cash makes up for the inflation losses you can easily pay for most things in cash. Or buy a money order when you can't. You can launder maybe as much as 60% of your income. Cash is spent and your legit salary goes to the bank.
Eating out? Cash
Vacation? Cash
Babysitter? Cash
Buy a used car? Cash (maybe even a new car...go to a like minded dealer)
Furniture? Cash
Home improvements? Cash
Clothes, jewelry? Cash
Obviously gotta do it in stages or else you stand out.