How many know the process of how most legal immigrants come to America?
How many know about form i-684 Affidavit of Support?
How many know about the lack of enforcement of that law?
Here is a link with a liberal slant that gives you some background.
State Suing Immigrants' Sponsors - tribunedigital-thecourant
The bottom line is the sponsors of immigrants are (almost) never held accountable when the newly sponsored immigrant goes on various forms of public assistance. They laugh at our laws.