My mother worked for a local tax filing company for 6 or 7 years in the early 2000s in NC. During that time she told me fraud was rampant with the child tax credits... multiple adults all claiming the same children, made-up children, etc.
Warms the heart when filing my taxes honestly. /s
If it escalates anymore and people need to start providing copies of the evidence required for those credits, lots of people will complain even more. Some of them might even be willing to pay more tariffs if they don't have to file more paperwork!