What happened when the U.S. got rid of guest workers?
A team of economists looked at the mid-century “bracero” program, which allowed nearly half a million seasonal farm workers per year into the U.S. from Mexico. The Johnson administration terminated the program in 1964, creating a large-scale experiment on labor supply and demand.
The result wasn’t good news for American workers. Instead of hiring more native-born Americans at higher wages, farmers automated, changed crops or reduced production.