That's related to individual entities, not to the government. Nothing prevents merchants anywhere in the world from offering people a 2-3% discount if they use Bitcoin to pay for their goods instead of credit cards, which costs the merchants a bunch of money.
The thing however is that merchants actually like people to pay with Bitcoin without offering any discounts, simply for the fact that with Bitcoin they make more money. I personally would offer the discount to people to attract more business, but not every merchant thinks like that, and most average people within this space paying with Bitcoin aren't familiar with the fee scheme of credit cards.
I'm a big supporter of governments exempting crypto to goods and services payments from taxation, but most will not do that because they don't want to turn crypto into an even bigger threat.