Where did you learn about this? I'd like to investigate in more detail. Visit Cuba and talk to people. The barman, the taxi driver, the bellhop, the waiter can

Where did you learn about this? I'd like to investigate in more detail. Visit Cuba and talk to people. The barman, the taxi driver, the bellhop, the waiter can easily earn in a day's tips in hard currency, over a month's wages in local currency, especially if they speak good English. It was the same in Russia when the USSR imploded. The chances were your taxi driver in Moscow had a physics PhD and had quit or was moonlighting from their official job in a research institute...