Of course sanctions have a negative effect on the economy, but the main cause of Cuban poverty is communist economics. Every communist country in the history of the world has been impoverished. It's a bankrupt system that has never worked and never can work. Here's just one reason why. The United States has a minimum wage while Cuba has a maximum wage. And that maximum wage is a paltry 20 dollars a month. No one can get ahead. It's impossible. It's illegal. When prosperity is a crime, there can be no prosperity, and that's entirely the fault of Cuba's communist party.

In Cuba, Prosperity is a Crime (22 March 2016)