[Cincinatus' Wife]

Cuba doesn't have its own currency?

Castro pays workers wages in pesos, and only one-tenth of the value of their labor. He take the other 90% (actually it's 100% because the pesos are just so much play money) paid in the dollars he demands from countries who use his workers. The only currency Castro accepts as exchange for goods and services, are U.S. dollars.

[Demidog]

paid in the dollars he demands from countries who use his workers

What countries use his workers?