The evidence is that incarceration just doesn’t work to deter crime or discourage recidivism. But America has the largest prison population in the world, and IIRC, the largest proportion of its own citizens in prison.

In a country that values punishment over any empirical improved outcomes, I wouldn’t hold my breath for people to care that taking a driver’s license away for unpaid support will end up hurting the children involved, or society as a whole.