They would hire more people or pay them more.
Why would they do that? They're not charities, employing people for the fun of it. Unless there's a need for more employees, nobody else is going to be employed, and those that are employed aren't going to earn any more than the companies can get away with paying them based on the job market. And even then, those employees (and everyone else) are going to have to pay more in tax to make up for the loss of corporation tax.
Are Facebook, Google, et al. who are paying miniscule amounts of tax in Europe and elsewhere demonstrating your theory? By the relative unemployment levels between there and the US, I'm guessing not.