"The lower down the educational scale you go, the less people are in control of their lives, and less in control of planning for children," [Flynn] said. [...] Unplanned pregnancies by less educated women could be reduced, perhaps by future scientific advances.
"I do have faith in science, and science may give us something that renders conception impossible unless you take an antidote," he said. "You could of course have a chemical in the water supply and have to take an antidote. If you had contraception made easier by progress, then every child is a wanted child."
Contra NRT, this is not an attempt to "justify state interference and coercion" to "stop the poor from breeding." Flynn merely wants to reduce unplanned pregnancies, by making contraception the default state: in other words, switch to an 'opt out' rather than 'opt in' policy. There's nothing remotely illiberal or coercive about this (assuming the antidote - 'opt out' option - is widely accessible). On the contrary, the proposal is plainly intended to increase the control that poor people have over their reproductive options. Flynn's suggestion is akin to family planning, not forced sterilization.
Update: Flynn's clarification confirms my above interpretation.