Here’s the problem. You run a poor country with a lot of people on death row. In your country, people on death row really get put to death, so they have a tremendous incentive to attempt escape. Building escape-proof facilities is expensive, and no matter how much you spend, the effectiveness will depend on the integrity of the guards. In your country, corruption is rampant. How do you keep the prisoners in?
Indonesia has come up with an interesting solution. Crocodiles. Try bribing this puppy.