Many people who are pessimistic about the effectiveness of social policy, such as the advocates of preference theory, think that whether someone gets married or has children is a personal choice that no collective mechanism can alter.
許多人對政策的效用持悲觀看法，例如西方學者提出的「選擇偏好理論」認為，要不要結婚、生子，是個人的偏好和選擇，不是任何公共機制可以改變的。