Ever heard about the "Pareto principle"?
The Pareto principle (also known as the 80–20 rule, the law of the vital few, and the principle of factor sparsity)[1] states that, for many events, roughly 80% of the effects come from 20% of the causes.[2] Management consultant Joseph M. Juran suggested the principle and named it after Italian economist Vilfredo Pareto, who, while at the University of Lausanne in 1896, published his first paper "Cours d'économie politique." Essentially, Pareto showed that approximately 80% of the land in Italy was owned by 20% of the population; Pareto developed the principle by observing that 20% of the peapods in his garden contained 80% of the peas.[3]
The principle can be adapted to most topics, even to business.
It is a common rule of thumb in business; e.g., "80% of your sales come from 20% of your clients." Mathematically, the 80–20 rule is roughly followed by a power law distribution (also known as a Pareto distribution) for a particular set of parameters, and many natural phenomena have been shown empirically to exhibit such a distribution.[4]
The principle can be adapted to most topics, even to business.
It is a common rule of thumb in business; e.g., "80% of your sales come from 20% of your clients." Mathematically, the 80–20 rule is roughly followed by a power law distribution (also known as a Pareto distribution) for a particular set of parameters, and many natural phenomena have been shown empirically to exhibit such a distribution.[4]
and my response, mass immigration into the US would not reduce world poverty, what would reduce world poverty would be if US stopped meddling in the affairs of other countries. Even the net result of US food contributions/aid is beneficial to US alone and not the recipient country. So there!! 
