I'm not sure that's true. By the same argument, you might say that free vaccines would encourage overpopulation, but (according to Bill Gates at least) the data

I'm not sure that's true. By the same argument, you might say that free vaccines would encourage overpopulation, but (according to Bill Gates at least) the data shows the opposite: "In society after society, he saw, when the mortality rate falls—specifically, below 10 deaths per 1,000 people—the birth rate follows, and population growth stabilizes." (http://www.forbes.com/sites/matthewherper/2011/11/02/the-second-coming-of-bill-gates/ http://www.forbes.com/sites/matthewherper/2011/11/02/the-sec...)