Since no one else on this page says it, I might as well:

B/C we're all used to using cash. (Paper bills & electronic)

That's the benchmark that we all have in our minds already.

For your govt to set a new benchmark on BTC transactions with far less usability/freedom, it will stick out like a sore thumb and be noticed by everyone. People won't like it, every one of us. Therefore, our political organizations (and bitcoiners have some of the best-funded PACs in existence already!) will keep bad laws like the one you're suggesting from being passed.

And as for a global effort? LOL; some countries like the Arab states & Israel, Russia & Ukraine, or North Korea & Japan, will never agree with each other on any issue. It's just too polarized out there to pass any global framework uniformly.