C'mon....don't be so naive. What employer wouldn't be "willing" to shed his American workers @ $ 15/hr. that forces him to pay FICA and other payroll style taxes in favor of a "willing" Mexican @ $7/hr. thus being able to criminally EVADE all those payroll taxes that honest American employers are stuck paying. Add to that all those "services" for his new employees that taxpayers get sucked into paying because he's not paying a livable wage and you have a recipe for disaster. It's all about the greed employed by many employers to lower their labor costs without having to lower the price of their end product. Noticed any decrease in the price of new houses even though many Mexicans have replaced American contractors.....noticed the crap work they do also?
But does the guest worker visa allow these workers to avoid paying those taxes?