What if I told you that outside of the US we're seeing tax offices progressively refusing cash payments and/or putting a penalty with a maximum accepted amount for people who still try to bring cash ?

Forcing all businesses to follow a model that is already getting phased out doesn't make sense.

yes it does make sense.

tax office has very little similarity with a retail store, idk what you are advocating here.

But they share the important detail of "essential to access". Now combine that with Operation Choke Point style abuses of power. Hello there arbitrary arrest and detention under the pretense of failure to pay taxes to the same government which prevented you from paying in the first place!