Who receives the benefits if the border wall is not built? What requirements are necessary for this benefit?

Answer 1

This question requires further context. Which country are you referring to? Which border are you referring to. If you're referring the southern border of the United States, there are different approaches you can take to analyzing the situation. First, you can ask yourself what would be the value added by the construction of the border wall. Then ask what would be the cost (we can use monetary cost as a proxy, though other externalities are sure to pop up). Then you take that factor and ask yourself, if we don't spend the funds and energy on building the wall, what would that money be used on. From there you can determine possible beneficiaries of the wall not being built. If you want to speak in a more causal manner, you could ask how would the wall affects immigration or others. The issue with the question is it's bound to be answered in a political manner. Asking a more particular and specific question, such as: what is the projected efficacy of the wall keeping out undocumented immigrants is probably a much better and neutral question.