I wonder what would happen if an entirely new approach to taxation were tested. A jury of 12 random people would inspect a companies accounts, assets etc and decide if the tax paid is "fair". The jury would have no training in tax matters, but would be presented documents produced by the government and the company to argue their cases.

If the tax paid is found to be unfair by the jury, the company gets nationalised with no compensation to shareholders. The government could re-privatize it by auctioning it off again.