Some countries would really do better if they were colonies.
President Ulysses S. Grant mentioned in his memoirs that he wanted the US Congress to purchase the island of Santo Domingo (the same island where Haiti and the Dominican Republic are now) for the purpose of resettling freed slaves. His proposal was not acted upon.
Haiti was a French slave colony, but the rulers were greatly outnumbered by slaves and were overthrown in a revolution (1791-1804). Forty years later, the Spanish occupants rebelled and established their own government in the Dominican Republic.