Immigrants get "paid" more than citizens to do a PhD in the U.S. because there's a green card "stapled" to each degree, which is of no value to citizens but of significant value to immigrants.
I called the argument "Devil's Advocate" because it is more than a little thankless to complain about someone working hard to obtain a privilege you were born into. It still hurts to have your dream job undercut by someone else, though.