To be quite honest it's and nice effort. But I think most large companies already don't pay that much of taxes. Like in Belgium the company tax is around 33%. There are already some accounting tricks to get the taxable amount down. There are even some legal ones made for multinationals. Second those companies mostly got tax deals that they pay less than 1% company taxes. So even opening it up doesn't work. But these companies can bend the rules as they want.