We're staying in northern Costa Rica where there is angst about illegal immigrants from Nicaragua, a million of them in a country of 5 million people. On the one hand, they're willing to do the hard jobs in the fields Costa Ricans no longer want to do. On the other, they bring crime and Costa Ricans complain that their prisons are full.
They also get benefits Costa Ricans don't. One example is health care. It is illegal in Costa Rica to deny health care to anyone, including illegal immigrants. Costa Ricans are required to pay 9% of their income for health care and if they are found not doing it, they have to pay the cost of any medical visits. But foreigners get free health care. So illegal immigrants from Nicaragua place a burden on the health care system without paying.
My expectation was Nicaragua would be very poor after the civil wars, devastating hurricanes, and now a for-life dictator.