Genetic Preferences?

As we learn to read DNA better, there could be a desire to have children who are more insurable--less likely to have traits that would contribute to anything from cancer in later life to alcoholism, even depression. But there is an economic disadvantage to having people who outlive their usefulness long enough to require a great amount of end-of-life care, so there might be a policy-driven desire to have citizens who could remain healthy and productive until 80 and then die rather quickly.