Fortunately, most of us are not placed in this horrible position.
My mother was forced to leave her country of birth for fear of death and had to endure extreme poverty as an adolescent refugee. Her sister´s family nearly died in a communist cσncєnтrαтισn cαмρ of starvation and disease. Fortunately, they survived and managed to get to the USA with nothing and where they had another terrible struggle to build up a living. My cousin´s family escaped from the same communist country because her husband was under threat of death, swimming the river with two babies in a basket and terrified in case they should cry and give them away. Just like the poor Mexicans you described. I always have sympathy for poor refugees. I have known poor Filipino women and men who worked with me in the hospital in London who were unable to give their children enough food and a good education and had to leave their own country. This was a cause of great sorrow and guilt for them.
I believe as Christians we are not just responsible for the welfare of people on our own little patch of the Earth, not even putting ourselves or our own families first.
It is totally immoral to keep vast surplus resources - money or goods - and tracts of land for our own exclusive use when others are starving or lacking in basic comforts. It is also un-Christian to create shortages, practice usury and profit unfairly from other people´s labour.
NO, I am no kind of communist or socialist, but neither am I in favour of capitalism!
I am a Distributist.