GDP per capita is a better predictor of fertility than access to contraceptives.

The rejection is only as flimsy as the contraceptive programs are effective, on the margins where increased funding might make a difference. They may not be very effective at all while additional children are still profitable.

"Socioeconomic development is considered the main cause of a decline over time in the benefits of having children and a rise in their costs."

"http://www.jstor.org/pss/20058399"