I thought of that, too, and would like to believe it because it is less nefarious. But then I thought of how that government imprisoned a political opponent on a fake charge, and how they are basically totalitarian. I lived in Hungary just after the Soviets fell there, and it really is true that totalitarian regimes breed corruption and schemes that usually involve either power or money (sometimes just nepotism, etc, lol).
Basically, expect any corrupt nonsense you can think of when there's a hugely powerful government that the people can't trust at all. Certainly the cargo could have had problems the gov't just doesn't want revealed. It may be ineptitude, but it may have involved some official's scheme for money or power, really (imho). I don't know that it relates to the crash, but there's probably something to the lack of disclosure, I think.