Cease all work visas bringing in technical/engineering skills until we have 99+% of our under-employed and unemployed engineers, scientists, etc. U.S. CITIZENS working.
FELONY PRISON TIME for executives of companies found to solicit and import or hire illegal immigrant labor to displace Americans.
TAX INCENTIVES to offset 'cheaper' overseas labor to keep U.S. Citizens working HERE on U.S. industry, rather than leaving all of the incentives to export first the jobs, then the factories, and then all of our wealth in trade imbalance and 'borrowing' overseas.
If nobody in America is left to create wealth with REAL, productive jobs, the ONLY people left to tax will be the 'wealthy'. The middle class will be extinct, and only McJobs will be left for utterly impoverished Americans.