In central Virginia at any rate the illegals are generally NOT practicing Catholics. Some are protestants and they do not attend Mass with any regularity. The RC Church in Mexico seems to be intent on driving the poor out, to judge by the way they charge fees for services like Baptism. (Or so the migrants told us. It's certainly true that they did NOT welcome the idea of our coming to their camps to celebrate until we reassured them that there was no fee. When they learned THAT, they welcomed us enthusiastically.)
We used to go up into the camps on Sunday evenings and celebrate Mass. It was not a money maker.
But that doesn't keep the bishops from not having a clue about the issue. I'm just arguing that any monetary motives are at best misguided and ill-informed. I'm all for mercy being the perfection of justice and all that, but this isn't mercy, it's enabling.
The more things change....