So what you are saying is that we are carefully protecting the moderate to low paying jobs?
The Chamber of Commerce wants American jobs to have a ceiling of $60K and a floor set at the minimum wage, with plenty of illegals to ensure that as many people work at the floor level wage as possible. They don't need to protect lower paying jobs from H1B visa holders because the illegals are there to drive the lower end of the pay scale downwards.
If low end jobs don't pay enough for people to work, then the COC wants them replaced by illegals or wants the government to subsidize cheap wages with the EITC, Obamacare or other public benefits that reduce their costs and reduce the incentives for employees to demand higher wages.
In brief, what the COC wants is a return to feudalism, where the vast majority of employees are indentured servants or serfs.