Victor Hanson has referred to a similar issue as well, though it dates back further than the Obama administration. Specifically referring to Mexico, mass immigration has a two-fold effect: 1) the Mexican government offloads people from it's own social services and; 2) the US government, due to one or more of benevolence, incompetence, or malice, provides social services to those immigrants, thus freeing up money to be sent back to family members in Mexico.
An article from 2007, where VDH refers to his 2003 book "Mexifornia."
Mexifornia, Five Years Later | City Journal | Illegal Alien Immigration From the article: "Worker remittances sent back to Mexico now earn it precious American dollars equal to the revenue from 500,000 barrels of daily exported oil. In short, Mexico cannot afford to lose its second-largest source of hard currency and will do almost anything to ensure its continuance."
Fast forward to 2023, and VDH refers to the same issue:
Mexico is not really an American friend | VICTOR DAVIS HANSON | Victor Davis Hanson | Opinion | Opinion Columns From the article: "[Mexican President] Obrador is equally callous in bragging that he exports his own poor. Left unsaid is that a naturally rich Mexico either will not, or cannot, adequately employ, feed, shelter and protect its own impoverished citizens. So instead, it cynically sees its own people as a lucrative export commodity while holding U.S. laws in veritable contempt. Currently, Mexican nationals are sending nearly $60 billion a year in remittances from the United States to Mexico to aid friends and families who do not find enough succor from their own government in Mexico City. Untaxed remittances far and away constitute the largest source of Mexico’s foreign exchange income."