Oh really?
Is he even vaguely aware of the consequences of this?
He is making a promise to the US government that the sponsored immigrant will not become a public charge. Food stamps are a means-tested benefit which would fall under that category.
In other words, the US government can (and generally will) come after him for reimbursement. (And you, actually, if you're a co-sponsor).
I would strongly recommend he not go ahead with this.
read more here - scroll down a little

