They come hear save a few thousand dollars US and go home(or send the money home). That $2-3000 exchanged back into their home country pathetic currency means they are now in the middle class of their home country.
Central America Newspapers Tout Open US Door for Illegal Minors
I don’t believe most ever intend to go back; that would be the ones with an IQ over 85 (that save their money to make something back home). The rest are just happy to have running water, public schools that feed their kids for free, and free food and rent for life.