Biden’s biggest anti-poverty plan is about to launch. Here’s how he can make it even better.

July 15, 2021, could wind up being one of the most important days in the history of American anti-poverty policy.

On that day, most parents in the United States will begin receiving monthly checks of up to $300 per child — no strings attached.

What’s technically happening: The child tax credit (CTC), a policy that has existed in some form since 1997, has been expanded, both in its size (going from $2,000 per child per year to $3,000 for children ages 6 through 17, and $3,600 for children under 6)...