[ineedasername]

As I said, small scale. All of those people in those jobs may want to buy a car, a house, go food shopping at a store that doesn't take crypto... If they're only paid in crypto, they can't do those things unless there's on-ramps and off-ramps from crypto currencies. Those ramps are bottlenecks subject to the regulations of the jurisdictions in which they take place.

At best, even if a shadow economy built up to facilitate those transactions, tax agencies (IRS for those of us in the US) will knock on a lot of doors and say "you have lots of stuff. That means you're receiving value of some sort. You owe us a cut of that, pay up."