This is from the Greenlining Institute report called 'Tech Untaxed: Tax Avoidance in Silicon Valley, and How America's Richest Company Pays a Lower Tax Rate than You Do' that I referred to earlier today and is one of their most simple and effective recommendations:

Stop rewarding tax avoidance. Corporations using offshore tax havens to dodge U.S. taxes should be barred from receiving taxpayer-funded federal contracts.

We could, of course, do the same here.