Clearly there foreign workers at Starbucks or there would not be protests: According to the popular videos circulating over the Internet, Starbucks halted a few minutes of their services across the nation as a form of protest against the recent “illegal deportation of immigrants.” "We are stopping work for a few minutes to read a statement in protest of actions against our fellow workers," Starbucks Workers United members at the Ellicott City location in Maryland said in a statement during their strike on April 1.
https://economictimes.indiatimes.com/news/international/glob...?
Immigration’s impact on wages, especially in the long term, is not as straightforward as “less supply → higher pay.” Multiple studies from the U.S. National Academies of Sciences and leading labor economists find that immigration has only small effects on native-born workers’ wages, and in most cases boost overall wage growth by fueling demand, entrepreneurship, and innovation. Restricting immigration might reduce competition in some low-skill job markets, but it can also harm industries that rely on labor shortages being filled, push up costs for consumers, and slow economic growth, which in the longer run counteracts any wage gains.
"Restricting immigration might reduce competition in some low-skill job markets, but it can also harm industries that rely on labor shortages being filled"
So restricting immigration of low wage workers, would push up wages in low wage industries. Seems pretty clear.