On the other hand, the new program will be far less intrusive than A.F.D.C., which constantly required that parents prove their need; there were even cases where aid was cut off because a caseworker discovered an able-bodied man in the house, claiming that he could and should be supporting the children. The new aid will be unconditional for families earning less than $75,000 a year.So no, this isn’t a return to welfare as we knew it; nobody will be able to live on child support. But it will sharply reduce child poverty. And it also, as I said, represents a philosophical break with the past few decades, and in particular with the obsessive fear that poor people might take advantage of government aid by choosing not to work.True, some on the right are still flogging that horse. The ever-shrinking Marco Rubio denounced plans for a child tax credit as “welfare assistance.” Wonks at the American Enterprise Institute warned that some unmarried mothers might somewhat reduce working hours, although their estimate looks pretty small — and since when is working a bit less to spend time with your kids an unadulterated evil?In any case, these traditional attacks, which used to terrify Democrats, no longer seem to be resonating. Clearly, something has changed in American politics.To be honest, I’m not sure what provoked this change. Many expected major change under President Barack Obama, elected in the wake of a financial crisis that should have discredited free-market orthodoxy. But although he achieved a lot — especially Obamacare! — there wasn’t a big paradigm shift.But now that shift seems to have arrived. And millions of American children will benefit.The Times is committed to publishing a diversity of letters to the editor. We’d like to hear what you think about this or any of our articles. Here are some tips. And here’s our email: letters@nytimes.com.Follow The New York Times Opinion section on Facebook, Twitter (@NYTopinion) and Instagram.