If country A has a large, prosperous population
And a company, let's call is Amabucks, makes ten billion a year sales in Country A
Country A has the right to say "If you want to operate in our country, you have to operate by our rules."
Now let's suppose that Country A is a leading member of the world's largest and most prosperous single market
And there are 27 countries who all think that taxes should be paid, even by billionaires and multinationals. And the union decides not to let companies play off each country against another, to win the lowest bid.
Is Amabucks going to shut up shop?