I may be off-base here, but I suspect that an intended 'side-effect' of the total ban, is a reminder to the locals that a good portion of their economy is fueled by US military $$$! I remember back in the day, local NAS personnel were being hassled constantly by speed traps, and excessive fines rough handling by local cops & courts. As back then, military paydays were in cash, paymasters were instructed to include a significant number of $2 bills in each payout. This to
re-remind the locals from where much of their cash inflow originated. After 2 or 3 'adjusted' bi-weekly paydays, the situation slowly resolved itself!
The locals may hate us & want us out,
but I'm sure that in the meantime, they have no problem accepting our Y-cash!
BzB