U.S. public policy has for decades rested on the expectation that parents will privately provide the cash and conditions their children need. This expectation is exceptional: most other wealthy countries’ public policies support children through a mix of public and private funds. The COVID-19 pandemic, however, radically changed U.S. policy. The severe economic dislocation that resulted led Congress to pass a series of measures that funneled trillions of public dollars to families and parents. Whether these measures should represent a temporary deviation from the nation’s free-market expectations during an unprecedented emergency or the first step in a long-term shift toward routine public funding for children remains an open question. This...