My country is not in EU but I have 2 countries near me which are in EU (one on 5km and the other 50km of my city) and I can pay much less taxes if I move there - but you are missing the point - I am not “fighting” here only for myself - I think we (Authors) are all in the same team here, right?
Envato is doing business 100% online (if I am not wrong) and am sure that they can move easy business outside the country (they do not have to physically move their employees).
And one more thing (probably you have not read all my posts) - there are services/websites which are working on same way like Elements (re-selling our own items) which you can use (for example if you want to sell over your own website) and you will pay only 5-6% no matter from which country is a customer and there is no other taxes (of course, there is a tax in your own country or in the country in which is registered your company - but that is something else).