A tax supported program whereby complete losers who aren't smart/competent enough to use birth control can have full-time babysitting services provided for up to 3 years before deciding to be a somewhat responsible parent.
This program also provides many benefits to the "loser", AKA bio-parent, including visits with the children at the loser's convenience (they don't have to show up if they have something more important to do, like sleep), free phones, subsidized rent, groceries, free health care, etc.
The foster parents, meanwhile, are attempting to teach the wild animals, er, offspring of these loser bio-parents to be civilized human beings.
At the end of the 3 years, the bio-parent, if they decide that it's not too much trouble, can make a sudden effort to appear responsible, in which case they get their offspring back on a permanent basis, and the loser pattern is extended another generation.
Well, we've had these kids for almost three years, and now they're going back to "Mom", so they can live in the house and ride in the car, and go to the doctor, all paid by our taxes.
At least "Mom" stopped smoking crack a couple of months ago. Maybe she won't leave the 5-year-old at home alone when she goes out to get more drugs. Or maybe they'll end up in foster care again.