Yes. It's propaganda.
Note that this is a problem not limited to communist countries like Cuba. In America, in particular, we have this problem when it comes to our teachers. Teaching the next generation is one of the most important jobs we have and, yet, the pay is so low that the best people for the job are disincentivized to go into that profession. When a hedge fund manager managing teacher pensions out-earns an entire school faculty who are invested in his fund while underperforming the S&P, we too have a problem.