This is his improve-the-world montage: for this to work, Doom has to be an unparalleled expert in agriculture, economics, and the distribution of goods. Interest rates lowering isn't impressive since Doom can say "lower interest rates" and boom. The stock market works on competition and speculation, none of which work in a world where everyone does & thinks what one guy says and everyone's singing in Stepford harmony; shouldn't the markets just stay sluggish? Is Doom telling them to rise? Why is Doom handing "rule of South Africa... to the black majority" (which sounds like white and Indian South Africans are out of government) if any South African government will do what he tells them anyway and it doesn't matter who "runs" it? (Who are the sworn enemies of Ethiopia with the tech to make deserts bloom? Maybe Wakanda, I guess)
He then grants independence to Puerto Rico. But he owns Puerto Rico and the rest of the world. Why is he doing that? Is it just for the ego?