American businesses devised the H-2B visa to enslave labor. Difficult or dirty less desirable jobs would reasonably pay more, but...
Employers can hire temporary H-2B foreign workers when they "can't find" sufficient local employees. But local people or other Americans will work if paid more. The employer strategy is to pay below what Americans require, and hire in more-vulnerable foreigners.
Much of the payroll then leaks away overseas.
Support Local. American workers should resist such scabby techniques, and H-2B foreign workers must understand their presence depresses wages.