I'm not sure Google, Facebook and the like are actively trying to make government irrelevant or heading for the bin for that reason. Their core stuff of providing search results or updates of what your friends are up to are kind of separate from the core duties of governments of making laws.

I agree the tax situation is a problem and think govenments should change the tax laws. Countries could estimate a fair tax for each multinational and tell them pay it or be blocked. Its not really the problem of the CEOs who can only really pay the tax required by law.

GDPR seems something of a success at regulating things supra-national level if not perfect.