This strikes me as an inflammatory — and generally untrue — statement. Even if you assume that all of these corporations pay zero federal income tax (they don't), then roughly half of Americans don't pay more (recall Mitt Romney's impolitic-but-true statement about 47% of Americans not paying any federal income tax).
But of course, most companies do actually pay federal income taxes, and when they don't it's often because of loss carryforwards. This particular aspect of tax law is not a "loophole", and lumping it in with lobbied-for tax credits/deductions doesn't help move the discourse forward.
The scope of the proposed tax hasn't been fully fleshed out, and I won't comment in-depth on it (as a former tax lawyer) at this point. But when I click through to see the original proposal and am greeted by this inflammatory and untrue statement, I am reminded that even the wonkiest of policy wonks will spin things pretty hard when it's election season.