Well, you can threaten to throw them out of the EU if they don't fix their unfair (to other member countries) laws. The EU should have more statutory authority

Well, you can threaten to throw them out of the EU if they don't fix their unfair (to other member countries) laws. The EU should have more statutory authority for laws like this just as in the case of the US Federal Government over State governments. At any rate, don't blame Amazon, Starbucks, but rather blame wealthy governments that refuse to spend the money for talent that can fix the laws (or iteratively "refix" them).