[endymi0n]

Tax unification is what keeps companies in check. Companies are just providers for services in the territory of any state. If these services don't warrant paying close-to-zero fees anymore, people and states should of course leave for better-run companies! Nothing else will make companies become more competitive than voting with one's feet. We should really become less sentimental about corporations, they are just crude constructs to provide services. Choosing the best service provider is something good as it increases overall efficiency as only sufficiently efficient systems survive in the long run.

Wanting tax loopholes and government competition is like one mafia asking the others to increase their protection charges so their clients don't leave. Such collusion is frowned upon for good reasons in free markets as it leads to worse outcomes due to reduced competition.

I'm hopeful that this idea will not work due to the profitability of breaking the deal and the big number of companies that exist.