You have a good point captainpooby.
And this is why it will only take one or two more terrorist attacks on the scale of 9/11 or a natural disaster like NO and we will be living on electronic currency ONLY. And since cards and other ID's can be misplaced, lost, stolen, counterfieted, etc. they will either go with an implanted "smartchip" or some form of bar code.
13:16 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:
13:17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.
13:18 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number [is] Six hundred threescore [and] six.