Okay, whoa, whoa, whoa, whoa, WHOA.
Who in here suggested A CASH CARD?
I'm one of the most liberal people you'll ever meet, and for me a large part of "liberal" means "the right to act as you will as long as it isn't hurting anyone" (which is why, much as I hate them, I support the right of the Westboro Baptist Church to have a website; picketing funerals should be illegal, but when it comes to what they put on the internet or carry on signs at ComiCon so everybody can laugh at them, First Amendment all the way). I don't want the government knowing when I pick up an extra $15 for babysitting or give two bucks to the saxophonist on the corner or make a potentially sensitive purchase (and in this day and age, a Planned Parenthood bake sale or a chalice for my altar could be a potentially sensitive purchase). It is, as one of my uncles would say, "nonna their ding-dong business."
Then, too, there is this: Mom sends teenage son to the corner store. "Pick us up some milk and bread," she says, and hands him cash. He comes back with milk, bread, change, and possibly a candybar. Now let's pretend she hands him one of these ID cards. Now what? He can't run his mom's errand because it's not his name on the card, and please, let's not waste time blustering over given situations, etc. I worked in a gas station for two years. You don't accept a credit card that has a name not belonging to the person using the card. Period.
And do you think for a single moment that vulture capitalism* wouldn't find a way to take advantage of this and scam the dickens out of people? If you do, you have a lot more faith in large-corporate America than I have.
It's an all-around bad idea and I hope it takes off about as well as a lead zeppelin. A change to our coinage I support; going to plastic? Never. I'd find a way to live on the barter system first and tell Big Brother to stay out of my life.
*not to be confused with free-market capitalism. I'm all for free-market capitalism. I'm against things like charging someone $900/month for a medication that cost $10/month to make when their options are "pay the $900, or die." Hence, vulture capitalism: circling and circling until you can collect off the carcass.