Actually, not paying minimum wages isn’t racist.
Not giving them a job at all because of their color is racism.
The preferred approach today would be to seek a federal grant to build the fence for “free”. Using govt contractors who would be paid Obama’s new minimum wage, of course.
The only weakness in the opening argument is the assumption that it would take three low-skilled workers to do the job. What if two could do it, for $30 total? How do we know it takes three?
Otherwise, I understand the point.