Immigration

It is interesting to me as I watch the Pope on T.V. telling us that we are the richest country in the world and we should have open borders to take in all the less fortunate no matter if they were legal or not.  But some how I find it most  interesting that the poorest countries in the world  such as Latin America, South America, Central America, Africa &  The Philippines  which are all under the Catholic influence  are poverty stricken. jobless, homeless no doctors, no food , no education and most of all no hope. Why does the richest church in the world with billions of dollars in assets allow this to happen to their church family? Why do they not bring them all to the Vatican City to be  properly cared for ?