You're not able to simply avoid tax payments or anything along those lines. You're able to use creative accounting, which is a fine thing to use if you have the resources, and you're also able to lobby Congress to change the tax code.

The problem doesn't lie in the accounting or anything like that, the problem lies in the lobbying of Congress to change the tax code to benefit the higher earners in society. That is where the disparity lies, as the middle and lower class don't have the resources to change the laws which are holding them down. While the high earners do.

Who knows the best way to change this though.