What if all those big corporates and businesses starts using crypto as a mode of payment just to avoid tax which will cause a direct loss to the government which uses tax for the betterment of the country. This might not affect corrupt countries as it doesn't matter because tax money goes to politician's coffers but what about developed nations?
Is that even possible ? If that's possible the government will ban cryptocurrencies for good and anyone caught using crypto assets will serve serious punishments, especially companies that are caught using it will face serious issues. So, I don't think any of them would like to try such a thing. But, I know for sure that if any company is making use of cryptocurrency they are still going to be paying tax while they are making use of it.
With the way that they are following these exchange up, it would even be very difficult for any big organization to be able to avoid tax because government will make sure that the exchange submit the detail of those that are using the exchange to them and I think form their history of deposit, they will be able to know the amount that has been transacted through them, so as long as centralized exchange do exist, it will never be possible for the government to miss out of the tax which is why you don't see them bother about scrapping cryptocurrency again.
China was once against cryptocurrency that they even planned on stopping their miner, but you have seen how they have made a U-turn from that and have fully accepted it because they must have found a very big way around the tax that has been of concerned to them.