As long as countries exist they'll be paying their workers in their local currencies and demanding taxes in their local currencies. Those are customarily quite large markets with motivated users.
Countries dont pay workers, employers do. And employers and workers can choose how they want to be payed. Some people are payed in btc for some time now.
I don't know which country you're residing in, but here in the UK 18.8 per cent of the work force is employed in the public sector. In certain regions over half of the local population's wages are paid by government money.
If you take into account the amount of people on pensions and on unemployment/disability etc then private employees are probably in the minority.