<_GroveR_>
Veteran XX
Good one, they already have credit cards you can wave across a scanner. The problem here, is each transaction would display on your credit card statement. So the wife would know how many times you went to the stand and bought beer. They would nag after the fact calling you a loser. When using cash, it's unknown and forgotten.
I didn't look at it this way. Hmm. Don't let your wife see the statement?