President Biden’s first signature legislative accomplishment, the American Rescue Plan Act (ARPA), is now law. Nearly $1.2 trillion in fiscal aid will pour into the economy before October, and another $700 billion will be doled out over the next four years. As one of us has written previously, $1.9 trillion is a significant underestimate of the plan’s total cost if temporary expansions of several tax credits are permanently extended. The largest of these temporary policies is the expanded child tax credit (CTC), touted by Democrats as a boon to low- and middle-income households. In addition to being costlier than the sticker price, a permanent CTC expansion, a goal expressed by many Democratic lawmakers, would have the unintended consequence of reducing employment.