While it does make sense in our mind to spend some resources on it. I still don't understand this from a government point of view. What do they gain from it? People are going to be paying their taxes either way, they don't have a choice, it's not like they're opening a new market or gaining new consumers of a product -- they tax people regardless of if they use bitcoin or not.
It sounds great in principle to all of this, but it's really a good deal of wasting resources and stuff when it comes down to the fact that people are going to be paying either way and have the ability to pay from a bank account / debit card / credit card (maybe in some areas)
It reduces friction. It's possible a few people might cough up where they might not have with the extra ball ache of returning to USD. Again it depends on the type of tax. I can well believe tons of people try to dodge capital gains. You can't really escape property taxes.