The notion of dictators looting a significant sum of money then getting to keep and use it does not match the observable reality either, so we have to keep looking.
Swiss bank accounts are not designed to store billions of 1973 dollars. Grand mansions do not cost anything near billions of dollars. The huge monuments are embezzlement at best, bad invesment more likely.
Billions of dollars would allow them to own serious chunks of First World industry, have stuff such as investment funds or charity non-profits. That's a different kind of money.
