Tax evasion is allowed by the people you elect, and you know it. Any unelected corporation can only be bound by the laws and system that it is a part of.
If you really want to change things then start speaking out against any and all politicians in bed with private actors (for ANY political party, btw) -- not overly-focusing on just "those politicians who disagree with you on abortion" or something else insanely and profoundly silly.
Also, if you really, and I mean truly, despise the way things are then stop complaining on the internet and run for local office? Then if that goes well, run for a higher office? Just an idea. But an idea that the vast majority of us on HN never take seriously.