It was not a plan, merely a thought expressed publically. In my lifetime American morals have completely collapsed. It is not that we did not have immoral behavior; but it was not extensively embraced as a “good thing.” I do not see anyone having effective powers of resistance. So it may be best to adapt to the rot and try to control the acting out.
Experience both here and in Britain shows that the incidence of unmarried motherhood is reduced when the benefits are reduced. Even welfare-class people are not totally irrational. They can follow the money just like smarter and better-educated folks. What takes pure moral fiber is NOT following the money, but choosing to do right even when it costs more.