This is precisely the tragedy of the commons. Apple's share of the tax base, while enormous compared to say mine, is still small. Furthermore, Apple's investors

This is precisely the tragedy of the commons. Apple's share of the tax base, while enormous compared to say mine, is still small. Furthermore, Apple's investors are a very small portion of the population, so only see a small part of the benefit of tax spending. So it's clearly worth saving a giant pile of money in exchange for very slightly worse gov't services.